Alcatel-Lucent OMNISWITCH 6800 Hardware Users Guide

Part No. 060196-10, Rev. G June 2007
OmniSwitch 6800 Series
Hardware Users Guide
www.alcatel-lucent.com
This user guide documents OmniSwitch 6800 Series hardware, including
chassis and associated components.
Copyright © 2007 by Alcatel-Lucent. All rights reserved. This document may not be reproduced in whole or in part without the express written permission of Alcatel-Lucent.
®
Alcatel-Lucent OmniSwitch
and the Alcatel-Lucent logo are registered trademarks of Alcatel-Lucent. Xylan®,
®
, OmniStack®, and Alcatel-Lucent OmniVista® are registered trademarks of Alcatel-Lucent.
OmniAccess™, Omni Switch/Router™, PolicyView™, RouterView™, SwitchManager™, VoiceView™, WebView™, X-Cell™, X-Vision™, and the Xylan logo are trademarks of Alcatel-Lucent.
This OmniSwitch product contains components which may be covered by one or more of the following U.S. Patents:
•U.S. Patent No. 6,339,830
•U.S. Patent No. 6,070,243
•U.S. Patent No. 6,061,368
•U.S. Patent No. 5,394,402
•U.S. Patent No. 6,047,024
•U.S. Patent No. 6,314,106
•U.S. Patent No. 6,542,507
26801 West Agoura Road
Calabasas, CA 91301
(818) 880-3500 FAX (818) 880-3505
support@ind.alcatel.com
US Customer Support—(800) 995-2696
International Customer Support—(818) 878-4507
Internet—service.esd.alcatel-lucent.com
ii OmniSwitch 6800 Series Hardware Users Guide June 2007

Contents

About This Guide .......................................................................................................... ix
Supported Platforms .......................................................................................................... ix
Who Should Read this Manual? ......................................................................................... x
When Should I Read this Manual? .....................................................................................x
What is in this Manual? ...................................................................................................... x
What is Not in this Manual? ............................................................................................... x
How is the Information Organized? ..................................................................................xi
Documentation Roadmap .................................................................................................. xi
Related Documentation ...................................................................................................xiii
User Manual CD .............................................................................................................xiv
Technical Support ........................................................................................................... xiv
Chapter 1 OmniSwitch 6800 Series ...........................................................................................1-1
Stacked Configurations ...................................................................................................1-3
Availability Features .......................................................................................................1-4
Management Module Redundancy ...........................................................................1-4
Software Rollback ....................................................................................................1-5
Backup Power Supplies ............................................................................................1-5
Hot Swapping ...........................................................................................................1-5
Hardware Monitoring ...............................................................................................1-6
Port and Fabric Capacities ..............................................................................................1-7
OmniSwitch 6800 Series Application Examples ............................................................1-8
Gigabit-to-the-Desktop Migration ............................................................................1-8
Server Aggregation ..................................................................................................1-9
Layer 3 Aggregation/Distribution ..........................................................................1-10
Small Enterprise Core ............................................................................................1-11
Chapter 2 OmniSwitch 6800 Series Chassis and Hardware Components .....................2-1
OmniSwitch 6800-24 ......................................................................................................2-3
OmniSwitch 6800-48 ......................................................................................................2-5
OmniSwitch 6800-U24 ...................................................................................................2-7
OmniSwitch 6800-24L ....................................................................................................2-9
OmniSwitch 6800-48L ..................................................................................................2-11
OmniSwitch 6800 Series Hardware Users Guide June 2007 iii
Contents
Status LEDs ...................................................................................................................2-13
10/100/1000 LEDs .................................................................................................2-14
1000 SFP LEDs ......................................................................................................2-14
10/100 LEDs ..........................................................................................................2-14
Rear Panel .....................................................................................................................2-15
Mounting the Switch .....................................................................................................2-16
Airflow Considerations ..........................................................................................2-16
Chassis Airflow ...............................................................................................2-17
Blank Cover Panels ................................................................................................2-18
Installation Options ................................................................................................2-19
Installing the Switch on a Tabletop or Bench .................................................2-19
Rack-Mounting the Switch ..............................................................................2-20
Installing and Removing Combo Port SFPs ...........................................................2-21
Setting Up a Stacked Configuration ..............................................................................2-22
Rack Mounting Stacked Configurations ................................................................2-22
Cabling Stacked Configurations .............................................................................2-22
Redundant Stacking Cable Connections .........................................................2-22
Supported Cabling Patterns .............................................................................2-22
Booting OmniSwitch 6800 Series Switches .................................................................2-25
Booting a Stand-alone Switch ................................................................................2-25
Booting Stacked Configurations ............................................................................2-26
Power Cords ..................................................................................................................2-27
Console Port ..................................................................................................................2-28
Serial Connection Default Settings ........................................................................2-28
Modifying the Serial Connection Settings .............................................................2-28
Console Port Pinouts ..............................................................................................2-30
RJ-45 Console Port – Connector Pinout ..........................................................2-30
Monitoring the Chassis .................................................................................................2-31
Checking Overall Chassis Status ............................................................................2-31
Checking Temperature Status ................................................................................2-31
Checking Fan Status ...............................................................................................2-32
Checking Power Supply Status ..............................................................................2-32
Additional Monitoring Commands ........................................................................2-32
Using LEDs to Visually Monitor the Chassis ........................................................2-33
OS6800-XNI-U2 10 Gigabit Expansion Module ..........................................................2-34
10 Gigabit Slot and Port Numbering ...............................................................2-35
10 Gigabit Expansion Modules and Token Usage ..........................................2-35
10 GigE Interoperability Between OS6800 and OS8800 Switches ................2-36
Installing 10 Gigabit Expansion Modules ..............................................................2-37
Removing 10 Gigabit Modules ..............................................................................2-38
Blank Cover Panel Requirement .....................................................................2-38
Installing SFP and XFP Transceivers .....................................................................2-39
iv OmniSwitch 6800 Series Hardware Users Guide June 2007
Contents
Backup Power Supply Components ..............................................................................2-39
OS6800-BPS-SHLF Backup Power Supply Shelf .................................................2-40
OS6800-BPS-SHLF Backup Power Shelf Specifications ...............................2-41
OS6800-BPS-225 225W Backup Power Supply ...................................................2-42
OS6800-BPS-225 225W Backup Power Supply Specifications .....................2-43
Rack-Mounting the OS6800-BPS-SHLF Power Shelf ..........................................2-44
Installing a Backup Power Supply In the Power Shelf ..........................................2-46
Installing the Backup Power Supply Daughtercard ...............................................2-48
Installing the Backup Power Supply Connector Cables .........................................2-48
Powering on the Backup Power Supplies ..............................................................2-48
Removing a Backup Power Supply ........................................................................2-49
Removing the Backup Power Supply Daughtercard ..............................................2-51
Blank Cover Panel Requirement ............................................................................2-51
Backup Power Supply Pinouts ......................................................................................2-52
Viewing Primary and Backup Power Supply Status .....................................................2-53
Viewing Power Supply Status for Stacked Configurations ...................................2-53
A Slot Number is Specified .............................................................................2-53
No Slot Number is Specified ...........................................................................2-54
Chapter 3 Managing OmniSwitch 6800 Series Stacks ........................................................3-1
In This Chapter ................................................................................................................3-1
OmniSwitch 6800 Series Stack Overview ......................................................................3-2
Roles Within the Stack ....................................................................................................3-2
Primary and Secondary Management Modules .......................................................3-2
Primary Management Module Selection ...........................................................3-5
Secondary Management Module Selection .......................................................3-8
Idle Module Role ....................................................................................................3-10
Pass-Through Mode ...............................................................................................3-11
Recovering from Pass-Through Mode (Duplicate Slot Numbers) ..................3-12
Stack Cabling ................................................................................................................3-15
Redundant Stacking Cable Connection ..................................................................3-16
Checking Redundant Stacking Cable Status ..........................................................3-17
Slot Numbering .............................................................................................................3-18
Dynamic Slot Number Assignment ........................................................................3-18
Manual Slot Number Assignment ..........................................................................3-20
Reverting to the Dynamic Slot Numbering Model ..........................................3-21
Hot-Swapping Modules In a Stack ...............................................................................3-22
Removing Switches from an Existing Stack ..........................................................3-22
Inserting Switches Into an Existing Stack ..............................................................3-22
Merging Stacks .......................................................................................................3-23
Understanding Tokens ..................................................................................................3-24
Checking Tokens Currently Used In a Stack .........................................................3-24
OmniSwitch 6800 Series Hardware Users Guide June 2007 v
Contents
Reloading Switches .......................................................................................................3-25
Reloading the Primary Management Module ........................................................3-25
Reloading the Secondary Management Module ....................................................3-27
Reloading Switches with Idle Roles .......................................................................3-29
Reloading Switches in Pass-Through Mode ..........................................................3-29
Reloading All Switches in a Stack .........................................................................3-30
Software Synchronization During a Full Reload .............................................3-30
Effects of Saved Slot Number Information on the Reload Process .................3-30
Avoiding Split Stacks .............................................................................................3-32
Changing the Secondary Module to Primary ................................................................3-33
Synchronizing Switches in a Stack ...............................................................................3-35
Automatic Synchronization During a Full Reload .................................................3-35
Monitoring the Stack .....................................................................................................3-36
Visually Monitoring the Stack ...............................................................................3-36
CLI Commands Supported on Both Primary and Secondary
Management Modules ............................................................................................3-37
Appendix A Regulatory Compliance and Safety Information ..............................................A-1
Declaration of Conformity: CE Mark ............................................................................A-1
Waste Electrical and Electronic Equipment (WEEE) Statement ............................A-1
China RoHS: Hazardous Substance Table .....................................................................A-2
Standards Compliance ....................................................................................................A-4
FCC Class A, Part 15 ..............................................................................................A-5
Canada Class A Statement ......................................................................................A-5
JATE ........................................................................................................................A-5
CISPR22 Class A warning ......................................................................................A-5
VCCI .......................................................................................................................A-6
Class A Warning for Taiwan and Other Chinese Markets ......................................A-6
Translated Safety Warnings ...........................................................................................A-7
Chassis Lifting Warning ...................................................................................A-7
Blank Panels Warning ......................................................................................A-7
Electrical Storm Warning .................................................................................A-7
Installation Warning .........................................................................................A-8
Invisible Laser Radiation Warning ...................................................................A-8
Lithium Battery Warning .................................................................................A-9
Operating Voltage Warning .............................................................................A-9
Power Disconnection Warning .......................................................................A-10
Proper Earthing Requirement Warning ..........................................................A-10
Read Important Safety Information Warning .................................................A-11
Restricted Access Location Warning .............................................................A-11
Wrist Strap Warning .......................................................................................A-12
vi OmniSwitch 6800 Series Hardware Users Guide June 2007
Contents
Instrucciones de seguridad en español .........................................................................A-13
Advertencia sobre el levantamiento del chasis ...............................................A-13
Advertencia de las tapaderas en blanco ..........................................................A-13
Advertencia en caso de tormenta eléctrica .....................................................A-13
Advertencia de instalación .............................................................................A-13
Advertencia de radiación láser invisible .........................................................A-13
Advertencia de la batería de litio ....................................................................A-13
Advertencia sobre la tensión de operación .....................................................A-13
Advertencia sobre la desconexión de la fuente ..............................................A-13
Advertencia sobre una apropiada conexión a tierra .......................................A-14
Leer “información importante de seguridad” .................................................A-14
Advertencia de acceso restringido ..................................................................A-14
Advertencia de pulsera antiestática ................................................................A-14
Clase de seguridad ..........................................................................................A-14
Index ...................................................................................................................... Index-1
OmniSwitch 6800 Series Hardware Users Guide June 2007 vii
Contents
viii OmniSwitch 6800 Series Hardware Users Guide June 2007

About This Guide

This OmniSwitch 6800 Series Hardware Users Guide describes your switch hardware components and basic switch hardware procedures.

Supported Platforms

The information in this guide applies to the following products:
OmniSwitch 6800-24
OmniSwitch 6800-48
OmniSwitch 6800-U24
OmniSwitch 6800-24L
OmniSwitch 6800-48L
Unsupported Platforms
The information in this guide does not apply to the following products:
OmniSwitch (original version with no numeric model name)
OmniSwitch 6624
OmniSwitch 6648
OmniSwitch 6600-U24
OmniSwitch 6600-P24
OmniSwitch 6602-24
OmniSwitch 6602-48
OmniSwitch 7700
OmniSwitch 7800
OmniSwitch 8800
Omni Switch/Router
OmniStack
OmniAccess
OmniSwitch 6800 Series Hardware Users Guide June 2007 page ix
Who Should Read this Manual? About This Guide

Who Should Read this Manual?

The audience for this users guide is network administrators and IT support personnel who need to configure, maintain, and monitor switches and routers in a live network. However, anyone wishing to gain knowledge on the OmniSwitch 6800 Series hardware will benefit from the material in this guide.

When Should I Read this Manual?

Read this guide as soon as you are ready to familiarize yourself with your switch hardware components. You should have already stepped through the first login procedures and read the brief hardware overviews in the OmniSwitch 6800 Series Getting Started Guide.
You should already be familiar with the very basics of the switch hardware, such as module LEDs and module installation procedures. This manual will help you understand your switch hardware components (e.g., chassis, stacking ports and cables, backup power supplies, etc.) in greater depth.

What is in this Manual?

This users guide includes the following hardware-related information:
Descriptions of stand-alone and stacked configurations.
Descriptions of “availability” features.
Descriptions of chassis types (OS6800-24 and OS6800-48).
Instructions for mounting the chassis.
Descriptions of hardware components (status LEDs, chassis, stacking ports and cables, backup power
supplies, etc.).
Managing a stand-alone chassis.
Setting up stacks.
Managing stacks.
Hardware-related Command Line Interface (CLI) commands.

What is Not in this Manual?

The descriptive and procedural information in this manual focuses on switch hardware. It includes information on some CLI commands that pertain directly to hardware configuration, but it is not intended as a software users guide. There are several OmniSwitch 6800 Series users guides that focus on switch software configuration. Consult those guides for detailed information and examples for configuring your switch software to operate in a live network environment. See “Documentation Roadmap” on page -xi and
“Related Documentation” on page -xiii for further information on software configuration guides available
for your switch.
page x OmniSwitch 6800 Series Hardware Users Guide June 2007
About This Guide How is the Information Organized?

How is the Information Organized?

This users guide provides an overview of OmniSwitch 6800 Series switches in the first chapter, an overview and procedures for setting up and managing OmniSwitch 6800 Series switches in the second chapter, and an overview and procedures for managing stacks in the third chapter.

Documentation Roadmap

The OmniSwitch user documentation suite was designed to supply you with information at several critical junctures of the configuration process.The following section outlines a roadmap of the manuals that will help you at each stage of the configuration process. Under each stage, we point you to the manual or manuals that will be most helpful to you.
Stage 1: Using the Switch for the First Time
Pertinent Documentation: OmniSwitch 6800 Series Getting Started Guide
Release Notes
The OmniSwitch 6800 Series Getting Started Guide provides all the information you need to get your switch up and running the first time. This guide provides information on unpacking the switch, rack mounting the switch, installing stacking cables, installing backup power supplies, unlocking access control, setting the switch’s IP address, setting up a password, and setting up stacks. It also includes succinct overview information on fundamental aspects of the switch, such as hardware LEDs, the software directory structure, stacking, CLI conventions, and web-based management.
At this time you should also familiarize yourself with the Release Notes that accompanied your switch. This document includes important information on feature limitations that are not included in other user guides.
Stage 2: Gaining Familiarity with Basic Switch Functions
Pertinent Documentation: OmniSwitch 6800 Series Hardware Users Guide
OmniSwitch 6800/6850/9000 Series Switch Management Guide
Once you have your switch up and running, you will want to begin investigating basic aspects of its hardware and software. Information about switch hardware is provided in the OmniSwitch 6800 Series Hardware Users Guide. This guide provide specifications, illustrations, and descriptions of all hardware components—e.g., chassis, stacking ports and stacking cables, backup power supplies, etc. It also includes steps for common procedures, such as removing and installing switch modules.
The OmniSwitch 6800/6850/9000 Switch Management Guide is the primary user guide for the basic software features on a single switch. This guide contains information on the switch directory structure, basic file and directory utilities, switch access security, SNMP, and web-based management. It is recommended that you read this guide before connecting your switch to the network.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page xi
Documentation Roadmap About This Guide
Stage 3: Integrating the Switch Into a Network
Pertinent Documentation: OmniSwitch 6800/6850/9000 Network Configuration Guide
OmniSwitch 6800/6850/9000 Advanced Routing Configuration Guide
When you are ready to connect your switch to the network, you will need to learn how the OmniSwitch implements fundamental software features, such as 802.1Q, VLANs, and Spanning Tree. The OmniSwitch 6800/6850/9000 Network Configuration Guide contains overview information, procedures and examples on how standard networking technologies are configured in the OmniSwitch 6800 Series.
The OmniSwitch 6800/6850/9000 Advanced Routing Configuration Guide includes configuration informa­tion for networks using Open Shortest Path First (OSPF).
Anytime
The OmniSwitch CLI Reference Guide contains comprehensive information on all CLI commands supported by the switch. This guide includes syntax, default, usage, example, related CLI command, and CLI-to-MIB variable mapping information for all CLI commands supported by the switch. This guide can be consulted anytime during the configuration process to find detailed and specific information on each CLI command.
page xii OmniSwitch 6800 Series Hardware Users Guide June 2007
About This Guide Related Documentation

Related Documentation

The following are the titles and descriptions of all the OmniSwitch 6800 Series user manuals:
OmniSwitch 6800 Series Getting Started Guide
Describes the hardware and software procedures for getting an OmniSwitch 6800 Series switch up and running. Also provides information on fundamental aspects of OmniSwitch software and stacking architecture.
OmniSwitch 6800 Series Hardware Users Guide
Detailed technical specifications and procedures for the OmniSwitch 6800 Series chassis and compo­nents. This manual also includes comprehensive information on assembling and managing stacked configurations.
OmniSwitch CLI Reference Guide
Complete reference to all CLI commands supported on OmniSwitch 6800, 6850, and 9000 Series switches. Includes syntax definitions, default values, examples, usage guidelines and CLI-to-MIB vari­able mappings.
OmniSwitch 6800/6850/9000 Switch Management Guide
Includes procedures for readying an individual switch for integration into a network. Topics include the software directory architecture, image rollback protections, authenticated switch access, managing switch files, system configuration, using SNMP, and using web management software (WebView).
OmniSwitch 6800/6850/9000 Network Configuration Guide
Includes network configuration procedures and descriptive information on all the major software features and protocols included in the base software package. Chapters cover Layer 2 information (Ethernet and VLAN configuration), Layer 3 information, security options (authenticated VLANs), Quality of Service (QoS), and link aggregation.
OmniSwitch 6800/6850/9000 Advanced Routing Configuration Guide
Includes network configuration procedures and descriptive information on all the software features and protocols included in the advanced routing software package. Chapters cover multicast routing (DVMRP and PIM-SM), and OSPF.
OmniSwitch Transceivers Guide
Includes SFP and XFP transceiver specifications and product compatibility information.
Technical Tips, Field Notices
Includes information published by Alcatel-Lucent’s Customer Support group.
Release Notes
Includes critical Open Problem Reports, feature exceptions, and other important information on the features supported in the current release and any limitations to their support.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page xiii
User Manual CD About This Guide

User Manual CD

All user guides for the OmniSwitch 6800 Series are included on the User Manual CD. This CD also includes user guides for other Alcatel-Lucent data enterprise products. In addition, it contains a stand-alone version of the on-line help system that is embedded in the OmniVista network management application.
Besides the OmniVista documentation, all documentation on the User Manual CD is in requires the Adobe Acrobat Reader program for viewing. Acrobat Reader freeware is available at www.adobe.com.
Note. In order to take advantage of the documentation CD’s global search feature, it is recommended that you select the option for searching PDF files before downloading Acrobat Reader freeware.
To verify that you are using Acrobat Reader with the global search option, look for the following button in the toolbar:
Note. When printing pages from the documentation PDFs, deselect Fit to Page if it is selected in your print dialog. Otherwise pages may print with slightly smaller margins.
PDF format and

Technical Support

An Alcatel-Lucent service agreement brings your company the assurance of 7x24 no-excuses technical support. You’ll also receive regular software updates to maintain and maximize your Alcatel-Lucent product’s features and functionality and on-site hardware replacement through our global network of highly qualified service delivery partners. Additionally, with 24-hour-a-day access to Alcatel-Lucent’s Service and Support web page, you’ll be able to view and update any case (open or closed) that you have reported to Alcatel-Lucent’s technical support, open a new case or access helpful release notes, technical bulletins, and manuals. For more information on Alcatel-Lucent’s Service Programs, see our web page at service.esd.alcatel-lucent.com, call us at 1-800-995-2696, or email us at support@ind.alcatel.com.
page xiv OmniSwitch 6800 Series Hardware Users Guide June 2007

1 OmniSwitch 6800 Series

The OmniSwitch 6800 Series is an advanced fixed configuration family of Ethernet switches. These switches provide wire rate layer-2 forwarding and layer-3 routing with advanced services.
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OmniSwitch 6800 Series Hardware Users Guide June 2007 page 1-1
OmniSwitch 6800 Series
The OmniSwitch 6800-24 (OS6800-24) is a 24 port, 10/100/1000 fixed stackable chassis.
The OmniSwitch 6800-48 (OS6800-48) is a 48 port, 10/100/1000 fixed stackable chassis. This switch
also supports a 10 Gigabit uplink module.
The OmniSwitch 6800-U24 (OS6800-U24) is a 24 fiber 1000 Mbps SFP connector chassis. This switch
also supports a 10 Gigabit uplink module.
The OmniSwitch 6800-24L (OS6800-24L) is a 24 port fixed stackable chassis. This chassis has 20
unshared 10/100 ports, which can be upgraded to 10/100/1000 ports.
The OmniSwitch 6800-48L (OS6800-48L) is a 48 port fixed stackable chassis. This chassis has 44
unshared 10/100 ports, which can be upgraded to 10/100/1000 ports.
Whether operating as a single switch or as a stack, the OmniSwitch 6800 Series offers effective availability, resiliency, and security features and are ideal for the following network applications:
Enterprise workgroups/LAN wiring closets
Edge deployments and branch offices
L3 aggregation/distribution layer switches in three-tier networks
Small enterprise core switching
Quality of service (QoS) for mission critical applications
Data center server clusters
Note on Terminology. In the user guides provided with your OmniSwitch 6800 Series switch, the terms
stack and virtual chassis are interchangeable terms referring to OmniSwitch 6800 Series switches in a stacked configuration. The terms module, switch, slot and element are used to refer to individual switches within a stacked configuration. The terms Chassis Management Module (CMM) and management module refer to those switches operating in a stack either in primary or secondary management roles. OmniSwitch 6800 Series switches operating in an idle role are essentially acting as network interface modules and therefore may be referred to as Network Interfaces (NIs).
page 1-2 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Stacked Configurations

Stacked Configurations

In addition to working as individual, stand-alone switches, OmniSwitch 6800 Series switches (except for the OS6800-U24) can also be linked together to form a single, high-density virtual chassis known as a stack.
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p
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1
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S
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S P B
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2
d
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2
e
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p
F
S
X
S
6
4
2 d e e
p S
7 1
5 1
3
1
1 1
8 1
9
6 1
7
4
1
5
3
8
6
4
7
5
3
8
6
4
7
1 2 1
5 1
0
1
3
1
1 1
8
1
9
6 1
4
1
2 1
0
1
2
0 1
5 2
8
3 2
1 2
9 1
6 2
4 2
2 2 2
5
2 0 2
3 2
1 2
9 1
6
2
4 2
2 2
0 2
1
6
1
4 1
9
3
7 3
5 3
3 3
0
4 1 3
8
3 9 2
6
7
3
9
3 4 3
7 3
2
3
5 3
0
3
3 3
8 2
9 2
7
0
3
8 2
0
4
1 3
8 3
6 3
4 3
2
3
1 2
0 2
21
T
C /A K
IN
L 3 2
8 1
9 1
7 1
0 2
8 1
3 4
1 4
4 4
2 4
3 4
1 4
4 4
2 4
le
so
23
n o C
1 2
4 2
22
2
4
2
2
T
C /A K
IN L 4 2
7 4
2 2
5 4
45
T AC / K N
I
L 7 4
le
so
46
n o C
5 4
8 4
47
6 4
48
T
C /A K
N
I L 8 4
7 4
6 4
5 4
45
T
C /A K N
I
L 7 4
le o
s
46
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5 4
8 4
47
6 4
48
T
C /A K
IN
L 8 4
6 4
OmniSwitch 6800 Series Stacked Configuration (Stack of Four Shown)
Stacking switches provides scalability by allowing users to quickly and easily expand 10/100/1000 port density. Twenty-four 10/100/1000 ports are added for each OS6800-24 brought into the stack and forty-eight 10/100/1000 ports are added for each OS6800-48.
Up to eight switches can be stacked. OmniSwitch 6800 Series switches can be mixed and matched in any combination within the stack. This provides a virtual chassis with a 10/100/1000 capacity of up to 384 ports.
Note. Other stackable Alcatel-Lucent products, such as the OmniSwitch 6600 Series switch, cannot be added to an OmniSwitch 6800 Series virtual chassis. For comprehensive information on managing stacked configurations, refer to Chapter 3, “Managing OmniSwitch 6800 Series Stacks.”
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 1-3
Availability Features OmniSwitch 6800 Series

Availability Features

The switch provides a broad variety of availability features. Availability features are hardware and software-based safeguards that help prevent the loss of data flow in the unlikely event of a subsystem failure. In addition, some availability features allow users to maintain or replace hardware components without powering off the switch or interrupting switch operations. Combined, these features provide added resiliency and help ensure that the switch or virtual chassis is consistently available for day-to-day network operations.
Hardware-related Availability features include:
Management Module Redundancy
Software Rollback
Backup Power Supplies
Hot Swapping
Hardware Monitoring

Management Module Redundancy

In stacked configurations, one OmniSwitch 6800 Series switch is designated as the primary “management module” for the stack. Because the stack can be thought of as a virtual chassis, the role of this primary management switch is to monitor and manage the functions of the stack.
Similar to chassis-based switches, such as the OmniSwitch 9700 and Omniswitch 9800, the stack also allows users to assign an additional switch as a secondary management module. As with the OS9700 and OS9800, the stack’s secondary switch immediately takes over management functions in the event of a primary switch failure.
All other switches in the stack are considered idle, and act very much like Network Interface (NI) modules, in that they provide Ethernet ports for 10/100/1000 traffic.
The stack provides support for all idle switches during primary-to-secondary failover. In other words, if the stack’s primary switch fails or goes offline for any reason, all idle switches will continue data transmission during the secondary switch’s takeover process.
Incoming Layer 2 packets will continue to be sent to the appropriate egress port during failover. Spanning Tree will continue handling BPDUs received on the switch ports, as well as port link up and down states. The Spanning Tree topology will not be disrupted.
Note. For detailed information on primary, secondary, and idle switches, as well as the failover process, refer to Chapter 3, “Managing OmniSwitch 6800 Series Stacks.”
page 1-4 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Availability Features

Software Rollback

Software rollback (also referred to as image rollback) essentially allows the OmniSwitch 6800 Series switches (in both standalone and stacked configurations) to return to a prior “last known good” version of software in the event of a system software problem. The switch controls software rollback through its resilient directory structure design (i.e., /flash/working and /flash/certified).
For detailed information on the software rollback feature, as well as the switch’s /flash/working and
/flash/certified directories, refer to the “Managing CMM Directory Content” chapter in the OmniSwitch 6800/6850/9000 Switch Management Guide.

Backup Power Supplies

OmniSwitch 6800 Series switches support an optional backup power supply shelf. The backup power supply shelf is a separate, rack-mountable chassis offering power supply bays for up to eight 225 watt power supply modules. This provides redundant chassis power on a 1:1 basis.
Backup power supplies operate in active standby mode. If the primary power supply fails unexpectedly, the backup power supply automatically takes up the full power load without disrupting the switch.
Note. For more information on backup power supplies, refer to Chapter 2, “OmniSwitch 6800 Series
Chassis and Hardware Components.”

Hot Swapping

Hot swapping refers to the action of adding, removing, or replacing components without powering off switches or disrupting other components in the switch or stack. This feature facilitates hardware upgrades and maintenance and allows users to easily replace components in the unlikely event of hardware failure.
The following hardware components can be hot swapped:
OS6800-BPS-225 backup power supplies
Backup power supply connector cables
Backup power supply daughtercard module
SFPs
Modules operating in idle status within a stacked configuration (see Chapter 3, “Managing
OmniSwitch 6800 Series Stacks.”)
Stacking cables (see note below)
Note. Stacking cables can be hot swapped as long as the stack is not split into two or more separate stacks in the process. In addition, a redundant cable connection must always be in place before swapping stacking cables. Otherwise, stack operations may be disrupted. For information on stacking cables, refer to
Chapter 2, “OmniSwitch 6800 Series Chassis and Hardware Components.”
For instructions on hot swapping backup power supplies, refer to Chapter 2, “OmniSwitch 6800 Series
Chassis and Hardware Components.” For instructions on hot swapping combo port SFPs, refer to the
instruction card provided with the SFP product. For instructions on hot swapping modules within a stacked configuration, refer to Chapter 3, “Managing OmniSwitch 6800 Series Stacks.”
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 1-5
Availability Features OmniSwitch 6800 Series

Hardware Monitoring

Automatic Monitoring
Automatic monitoring refers to the switch’s built-in sensors that automatically monitor operations. If an error is detected (e.g., over-threshold temperature), the switch immediately sends a trap to the user. The trap is displayed on the console in the form of a text error message. (In the case of an over-threshold temperature condition, the chassis displays an amber TMP LED in addition to sending a trap.)
LEDs
LEDs, which provide visual status information, are provided on the chassis front panel. LEDs are used to indicate conditions such as hardware and software status, temperature errors, link integrity, data flow, etc. For detailed LED descriptions, refer to Chapter 2, “OmniSwitch 6800 Series Chassis and Hardware
Components.”
User-Driven Monitoring
User-driven hardware monitoring refers to CLI commands that are entered by the user in order to access the current status of hardware components. The user enters “show” commands that output information to the console. Monitoring information for chassis components such as the optional back up power supply, chassis temperature sensor, and chassis fans is provided in Chapter 2, “OmniSwitch 6800 Series Chassis
and Hardware Components.” Show commands for all features are described in detail in the OmniSwitch
CLI Reference Guide.
page 1-6 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Port and Fabric Capacities

Port and Fabric Capacities

OmniSwitch 6800 Series switches offer 20 non combo 10/100/1000 Ethernet ports, 44 non combo 10/100/1000 Ethernet ports, 20 non combo 1000 Mbps SFP connectors, 20 non combo 10/100 Ethernet ports, or 44 non combo 10/100 Ethernet ports. The switches also offer combo ports, which consist of four paired Gigabit Ethernet SFP connectors and four 10/100/100 Ethernet ports.
OmniSwitch 6800 Series Switching Fabric Capacity
OmniSwitch 6800-24 160 Gbps aggregate OmniSwitch 6800-48 160 Gbps aggregate OmniSwitch 6800-U24 80 Gbps OmniSwitch 6800-24L 160 Gbps aggregate OmniSwitch 6800-48L 160 Gbps aggregate
OmniSwitch 6800 Series Performance Specifications
Stacking capacity 40 Gbps Jumbo frames Up to 9 KB MAC addresses 16 K
For detailed information on OmniSwitch 6800 Series features, functions, and technical specifications, refer to Chapter 2, “OmniSwitch 6800 Series Chassis and Hardware Components” and Chapter 3,
“Managing OmniSwitch 6800 Series Stacks.”
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 1-7
OmniSwitch 6800 Series Application Examples OmniSwitch 6800 Series

OmniSwitch 6800 Series Application Examples

The following OmniSwitch 6800 Series applications are described below:
Gigabit-to-the-desktop migration
Server aggregation
Layer 3 Aggregation/Distribution
Small Enterprise core

Gigabit-to-the-Desktop Migration

OmniSwitch 6800 Series switches provide a migration path to Gigabit on the edge of the LAN. For example:
10/100/1000 Layer 2+ Switching
10/100/1000 Layer 3 Switching
OmniSwitch 6800
Layer 2+ 10/100 Switching
OmniSwitch 6800
OmniSwitch 6800
Core Layer
Application Example: Gigabit-to-the-Desktop Migration
page 1-8 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series OmniSwitch 6800 Series Application Examples

Server Aggregation

The OmniSwitch 6800 Series switch is a well-suited server aggregation switch, especially for space­constrained data centers, where the switch can be installed in the same rack as the servers. For example:
10/100/1000 Switching
10/100/1000 Switching
Application Example: Server Aggregation
OmniSwitch 6800
Servers
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 1-9
OmniSwitch 6800 Series Application Examples OmniSwitch 6800 Series

Layer 3 Aggregation/Distribution

OmniSwitch 6800 Series switches placed in the distribution layer of three-tier networks provide high­capacity, wire speed Layer 2 switching, Layer 3 routing, and intelligent services near the edge of the network. For example:
10/100 Switching
Gigabit Uplinks
OmniSwitch 6800
Aggregation Layer (L2/L3 Switching)
OmniSwitch 6800
Multiple 1 Gig
10 Gig
10 Gig
10 Gig
Core Layer (L3)
Application Example: Layer 3 Aggregation/Distribution
page 1-10 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series OmniSwitch 6800 Series Application Examples

Small Enterprise Core

With its high-speed switching capacity, supported Layer 3 routing protocols, advanced network services, and wire speed 10 Gigabit capability, the OmniSwitch 6800 Series provides effective core switching for smaller Enterprise networks (200-500 ports). For example:
10/100 layer 2 Switching
10/100 layer 2 Switching
OmniSwitch 6800 Series Switch
Gigabit Layer 3 Switching
Gigabit Uplinks
OmniSwitch 6800 Series Switch
Internet Router
10/100 layer 2 Switching
Servers
Internet
Application Example: Small Enterprise Core
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 1-11
OmniSwitch 6800 Series Application Examples OmniSwitch 6800 Series
page 1-12 OmniSwitch 6800 Series Hardware Users Guide June 2007
2 OmniSwitch 6800 Series
Chassis and Hardware
Components
OmniSwitch 6800 Series switches are available in five stackable chassis configurations—the 24-port OmniSwitch 6800-24 (OS6800-24), OmniSwitch 6800-U24 (OS6800-U24), OmniSwitch 6800-24L (OS6800-24L), the 48-port OmniSwitch 6800-48 (OS6800-48), and OmniSwitch 6800-48L (OS6800­48L). This chapter includes detailed information on these chassis types. Topics include:
OmniSwitch 6800 Series chassis descriptions
Technical specifications
Mounting the switch
Setting up a stacked configuration
Booting OmniSwitch 6800 Series switches
Monitoring the chassis
Backup power supply components
Monitoring backup power supply status
Pinouts, power cord, and console port specifications
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-1
OmniSwitch 6800 Series Chassis and Hardware Components
OmniSwitch 6800-24
23
21
21
CT
23 LINK/A
23
Console
21
24
19
22
17
22
24
15
24 LINK/ACT
22
13
20
18
16
11
9
7
5
12
3
10
Speed 1
8
6
4
Speed 2
24
OmniSwitch 6800-
PRI
BPS
OK
TMP
PWR FAN
19
17
15
13
20
11
18
9
16
7
5
14
3
12
48
10
Speed 1
OmniSwitch 6800-
8
6
PRI
4
BPS
OK
TMP
PWR
Speed 2
XFP2
FAN
XFP1
15
13
11
9
7
5
14 16
12
3
10
4
1
8
7
5
OmniSwitch 6800-U2
6
3
1
4
2
BPS
OK
68
PWR
4
2
FAN TMP
XFP1 XFP2
14
OmniSwitch 6800-48
47
45
5 4
CT
47 LINK/A
47
Console
45
48
43
46
41
46
48
39
48 LINK/ACT
46
44
42
40
32
23
30
21
28
26
24
22
3 2
21
19
17
15
24
13
22
20
18
11
9
16
14
12
10
Speed
22
20
18
OmniSwitch 6800-U24
Console
24
CLASS 1 LASER PRODUCT
23
22
LNK/ACT
21
OmniSwitch 6800-24L
3 2
1 2
1 2
T
C A / K N
I L 3
2
le
3
so
2
n o C
1 2
4
2 9 1
2 2
7
1
2
4
2
2
T
C A / K
N I
5
L
1
4
2
2
3
2
1
0 2
8
1
6 1
4
1 1
9
7
5
2 1
3
0
1
1
d e e
p S
8
6
4
2
d e e
p S
L 4
2
­0 0
8
6
h
itc iSw n
m O
I
R
P
S
P
K
B
O
P
M
T
R W
P
N A
F
9 1
7 1
5 1
3 1
0
2 1 1
8
1
9
6 1
7
4
1
5
2
3
1
L 8 4
-
0 0 8
6
0
h
1
1
itc
d e e
w
p S
iS n
m
O
8
6
I R P
S
P
4
K
B
O
P M T
R W
P
2 d e
2
e
P
p
F
S
X N A F
1 P F
X
1
OmniSwitch 6800-48L
7
4
5 4
45
T C /A
K
N I L 7 4
le
so
47
on C
5 4
8
4 3 4
46
1 4
6 4
48
T C A /
K N I
9
L
3
8 4
6
7
4
3
4
4 5 3
2
4 3 3
0
4 1 3
8 3
9
2
6
7
3
2
4
5
3
2
2 3
3 2
0
3 1 2
8
2
6 2
4 2
2 2
page 2-2 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components OmniSwitch 6800-24

OmniSwitch 6800-24

The OmniSwitch 6800-24 is a stackable edge/workgroup switch offering 24 10/100/1000Base-T ports, as well as four combo SFP connectors for high speed connections.
The front panel of the OS6800-24 chassis contains the following major components:
System status and slot indicator LEDs
(24) 10/100/1000Base-T ports
(4) Combo SFP connectors for 1000Base-X connections
Console port (RJ-45)
Refer to the illustration below for more front panel information. For detailed LED descriptions, refer to
page 2-13. For information on the chassis rear panel, refer to page 2-15.
Combo SFP Connectors
The OS6800-24 provides four combo SFP connectors for 1000Base-X high­speed connections.
System Status LEDs
For detailed information on OS6800-24 system status and other LEDs, refer to
page 2-13.
OmniSwitch 6800-24
OK
PWR
FAN TMP
PRI
BPS
Speed 1
10/100/1000Mbps Ports
The OS6800-24 provides 20 fixed 10/100/1000BaseT non combo ports (1–20) and 4 fixed 10/100/1000BaseT combo ports (21–24). These ports are auto-sensing and auto-MDIX and use RJ-45 connectors.
3
567891011
4Speed 2
By default, when an SFP is installed in a combo port, it takes over the port number of the corresponding RJ-45 Ethernet port. In other words, if an SFP is installed in the slot labeled 24, Ethernet port 24 is no longer available and can­not be used for 10/100/1000 traffic. This default setting is referred to as “preferred fiber.” Refer to “Configuring Ethernet Ports” in the Network Configuration Guide for detailed information, including steps for configuring combo port settings.
151617181920212223 LINK/ACT
13
12
14
24 LINK/ACT
21
23
22
24
21 23
22 24
Console
Console Port
The OS6800-24 front panel provides one RJ-45 port for console connections. Con­sole connections are used by network administrators for switch management. This female RJ-45 connector provides a DTE console connection.
OmniSwitch 6800-24 Front Panel
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-3
OmniSwitch 6800-24 OmniSwitch 6800 Series Chassis and Hardware Components
OS6800-24 Specifications
Total 10/100/1000Base-T ports
24
per switch Total combo SFP connectors per
4
switch Total 10/100/1000Base-T ports
192 (stack of eight switches)
per stack Total combo SFP connectors per
32 (stack of eight switches)
stack Fabric capacity 160 Gbps Power 150W AC/DC power supply, providing +12V @ 12.5A;
90-264VAC50-60 Hz universal input
Total available power supplies 2 (one factory-installed power supply and
one optional backup power supply) Flash memory size 64 MB RAM memory size 256 MB SDRAM Overall Width (rack-mount
19 inches, approx. flanges included)
Chassis Width (rack-mount
17.32 inches
flanges not included) Height 1.73 inches Height (rack units) 1 RU Chassis Depth 16.73 inches Weight 13.88 lbs. (6.30 Kg) Humidity 5% to 90% Relative Humidity (Operating)
0% to 95% Relative Humidity (Storage) Operating Temperature 0 to 45 degrees, Celsius Storage Temperature -20 to 70 degrees, Celsius Altitude Operating altitude: sea level at 40 degrees, Celsius and
10000 feet at 0 degrees, Celsius
Storage altitude: sea level at 40000 feet
page 2-4 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components OmniSwitch 6800-48

OmniSwitch 6800-48

The OmniSwitch 6800-48 is a stackable edge/workgroup switch offering 48 10/100/1000Base-T ports, as well as four combo SFP connectors for high speed connections.
The front panel of the OS6800-48 chassis contains the following major components:
System status and slot indicator LEDs
(48) 10/100/1000Base-T ports
(4) Combo SFP connectors for 1000Base-X connections
Console port (RJ-45)
An Optional 10 Gigabit module is also supported (see page 2-34).
Refer to the illustration below for more front panel information. For detailed LED descriptions, refer to
page 2-13. For information on the chassis rear panel, refer to page 2-15.
Combo SFP Connectors
The OS6800-48 provides four combo SFP connectors for 1000Base-X high­speed connections.
Status and Slot Indicator LEDs
For detailed information on OS6800-48 status and slot indicator LEDs, refer to
page 2-13.
OmniSwitch 6800-48
OK
PWR
FAN
XFP1 XFP2
Speed 1
PRI
BPS
TMP
Speed 2
34567891011
13
12
10/100/1000Mbps Ports
The OS6800-48 provides 44 fixed 10/100/1000BaseT ports (1–44) and 4 fixed 10/100/1000BaseT combo ports (45–48). These ports are auto-sensing and auto­MDIX and use RJ-45 connectors.
15
17181920212223
1614
By default, when an SFP is installed in a combo port, it takes over the port number of the corresponding RJ-45 Ethernet port. In other words, if an SFP is installed in the slot labeled 45, Ethernet port 45 is no longer available and cannot be used for 10/100/1000 traffic. This default setting is referred to as “preferred fiber.” Refer to “Configuring Ethernet Ports” in the Network Con- figuration Guide for detailed information, including steps for configuring combo port settings.
272829303132333435
25
24
26
36
394041424344454647 LINK/ACT
37
38
48 LINK/ACT
45
47
46
48
45 47
46 48
Console
Console Port
The OS6800-48 front panel provides one RJ-45 port for console connections. Con­sole connections are used by network administrators for switch management. This female RJ-45 connector provides a DTE console connection.
OmniSwitch 6800-48 Front Panel
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-5
OmniSwitch 6800-48 OmniSwitch 6800 Series Chassis and Hardware Components
OS6800-48 Specifications
Total 10/100/1000Base-T ports
48 per switch
Total combo SFP connectors per
4 switch
Total 10/100/1000Base-T ports
384 (stack of eight switches) per stack
Total combo SFP connectors per
32 (stack of eight switches) stack
Fabric capacity 160 Gbps Power 150W AC/DC power supply, providing +12V @ 12.5A;
90-264VAC50-60 Hz universal input Total available power supplies 2 (one factory-installed power supply and
one optional backup power supply) Flash memory size 64 MB RAM memory size 256 MB SDRAM Overall Width (rack-mount
19 inches, approx. flanges included)
Chassis Width (rack-mount
17.32 inches
flanges not included) Height 1.73 inches Height (rack units) 1 RU Chassis Depth 16.73 inches Weight 14.41 lbs. (6.54 Kg) Humidity 5% to 90% Relative Humidity (Operating)
0% to 95% Relative Humidity (Storage) Operating Temperature 0 to 45 degrees, Celsius Storage Temperature -20 to 70 degrees, Celsius Altitude Operating altitude: sea level at 40 degrees, Celsius and
10000 feet at 0 degrees, Celsius
Storage altitude: sea level at 40000 feet
page 2-6 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components OmniSwitch 6800-U24

OmniSwitch 6800-U24

The OmniSwitch 6800-U24 is an edge/workgroup switch offering 24 1000Base-X SFP connectors, as well as four combo 10/100/1000Base-T ports.
The front panel of the OS6800-U24 chassis contains the following major components:
System status and slot indicator LEDs
(24) 1000Base-X SFP connectors
(4) Combo RJ-45 10/100/1000Base-T ports
Console port (RJ-45)
An Optional 10 Gigabit module is also supported (see page 2-15).
Note. The OmniSwitch 6800-U24 operates in stand-alone mode only. It does not support stacking.
Refer to the illustration below for more front panel information. For detailed LED descriptions, refer to
page 2-13. For information on the chassis rear panel, refer to page 2-15.
Combo RJ-45 10/100/1000 Ports
The OS6800-U24 provides four combo 10/100/1000BaseT ports. These ports are auto-sensing and auto-MDIX and use RJ-45 connectors.
System Status LEDs
For detailed information on OS6800-U24 system status and other LEDs, refer to page
2-13.
OmniSwitch 6800-U24
OK
PWR
FAN TMP
XFP1 XFP2
BPS
1357
2468
1
3
24
57
68
9111315
10 12 14 16
9
10 12
1000 Mbps SFP Connectors
The OS6800-U24 provides 20 non combo SFP con­nectors for 1000Base-X SFP transceivers (1–20) and 4 combo SFP connectors for 1000Base-X SFP trans­ceivers (21–24).
OmniSwitch 6800-U24 Front Panel
By default, when an SFP is installed in a combo port, it takes over the port number of the corresponding RJ-45 Ethernet port. In other words, if an SFP is installed in the slot labeled 24, Ethernet port 24 is no longer available and cannot be used for 10/100/1000 Mbps traffic. This default setting is referred to as “preferred fiber.” Refer to “Configuring Ethernet Ports” in the Network Configuration Guide for detailed information, including steps for configuring combo port settings.
17
19
18 20
21 23
22 24
11
13 15
14 16
17 19 21 23
18 20 22 24
CLASS 1 LASER PRODUCT
21 22 23 24
Speed
LNK/ACT
Console Port
The OS6800-U24 front panel provides one RJ-45 port for console connections. Console connections are used by network administrators for switch management. This female RJ-45 connector provides a DTE console connection.
Console
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-7
OmniSwitch 6800-U24 OmniSwitch 6800 Series Chassis and Hardware Components
OS6800-U24 Specifications
Total 1000Base-X SFP connec-
24 tors per switch
Total combo 10/100/1000Base-
4 T ports per switch
Fabric capacity 80 Gbps Power 150W AC/DC power supply, providing +12V @ 12.5A;
90-264VAC50-60 Hz universal input Total available power supplies 2 (one factory-installed power supply and
one optional backup power supply) Flash memory size 64 MB RAM memory size 256 MB SDRAM Overall Width (rack-mount
19 inches, approx. flanges included)
Chassis Width (rack-mount
17.32 inches
flanges not included) Height 1.73 inches Height (rack units) 1 RU Chassis Depth 16.73 inches Weight 13.4 lbs. (5.0 Kg) Humidity 5% to 90% Relative Humidity (Operating)
0% to 95% Relative Humidity (Storage) Operating Temperature 0 to 45 degrees, Celsius Storage Temperature -20 to 70 degrees, Celsius Altitude Operating altitude: sea level at 40 degrees, Celsius and
10000 feet at 0 degrees, Celsius
Storage altitude: sea level at 40000 feet
page 2-8 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components OmniSwitch 6800-24L

OmniSwitch 6800-24L

The OmniSwitch 6800-24L is a stackable edge/workgroup switch offering 24 10/100Base-T ports, as well as four combo SFP connectors for high speed connections.
The front panel of the OS6800-24L chassis contains the following major components:
System status and slot indicator LEDs
(20) 10/100Base-T ports
(4) Combo 10/100/1000Base-T ports
(4) Combo SFP connectors for 1000Base-X connections
Console port (RJ-45)
Note. The 20 (non combo ports) 10/100Base-T ports on the OmniSwitch 6800-24L can be upgraded to 10/100/1000Base-T ports. Please contact your Alcatel-Lucent representative for more information.
Refer to the illustration below for more front panel information. For detailed LED descriptions, refer to
page 2-13. For information on the chassis rear panel, refer to page 2-15.
System Status LEDs
For detailed information on OS6800­24L system status and other LEDs, refer to page 2-13.
OmniSwitch 6800-24L
OK
PWR
FAN TMP
PRI
BPS
Speed 1
10/100Mbps and 10/100/100Mbps Ports
The OS6800-24L provides 20 fixed non combo 10/100BaseT (1–20) ports and 4 fixed 10/100/1000BaseT combo ports (21–24). These ports are auto-sensing and auto-MDIX and use RJ-45 connectors.
3
567891011
4Speed 2
Combo SFP Connectors
The OS6800-24L provides four combo SFP connectors for 1000Base-X high-speed connections.
By default, when an SFP is installed in a combo port, it takes over the port number of the corresponding RJ-45 Ethernet port. In other words, if an SFP is installed in the slot labeled 24, Ethernet port 24 is no longer available and cannot be used for 10/100/1000 traffic. This default setting is referred to as “preferred fiber.” Refer to “Configuring Ethernet Ports” in the Network Configuration Guide for detailed information, including steps for configur­ing combo port settings.
151617181920212223 LINK/ACT
13
12
14
24 LINK/ACT
21
23
22
24
21 23
22 24
Console
Console Port
The OS6800-24L front panel provides one RJ-45 port for console connections. Con­sole connections are used by network administrators for switch management. This female RJ-45 connector provides a DTE console connection.
OmniSwitch 6800-24L Front Panel
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-9
OmniSwitch 6800-24L OmniSwitch 6800 Series Chassis and Hardware Components
OS6800-24L Specifications
Total 10/100/Base-T ports per
20 switch
Total 10/100/1000Base-T
4 combo ports per switch
Total combo SFP connectors per
4 switch
Total 10/100Base-T ports per
160 (stack of eight switches) stack
Total combo SFP connectors per
32 (stack of eight switches) stack
Fabric capacity 160 Gbps Power 150W AC/DC power supply, providing +12V @ 12.5A;
90-264VAC50-60 Hz universal input Total available power supplies 2 (one factory-installed power supply and
one optional backup power supply) Flash memory size 64 MB RAM memory size 256 MB SDRAM Overall Width (rack-mount
19 inches, approx. flanges included)
Chassis Width (rack-mount
17.32 inches
flanges not included) Height 1.73 inches Height (rack units) 1 RU Chassis Depth 16.73 inches Weight 13.88 lbs. (6.30 Kg) Humidity 5% to 90% Relative Humidity (Operating)
0% to 95% Relative Humidity (Storage) Operating Temperature 0 to 45 degrees, Celsius Storage Temperature -20 to 70 degrees, Celsius Altitude Operating altitude: sea level at 40 degrees, Celsius and
10000 feet at 0 degrees, Celsius
Storage altitude: sea level at 40000 feet
page 2-10 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components OmniSwitch 6800-48L

OmniSwitch 6800-48L

The OmniSwitch 6800-48L is a stackable edge/workgroup switch offering 48 10/100/Base-T ports, as well as four combo SFP connectors for high speed connections.
The front panel of the OS6800-48L chassis contains the following major components:
System status and slot indicator LEDs
(44) 10/100Base-T ports
(4) Combo 10/100/1000Base-T ports
(4) Combo SFP connectors for 1000Base-X connections
Console port (RJ-45)
An Optional 10 Gigabit module is also supported (see page 2-15).
Note. The 44 (non combo ports) 10/100Base-T ports on the OmniSwitch 6800-48L can be upgraded to 10/100/1000Base-T ports. Please contact your Alcatel-Lucent representative for more information.
Refer to the illustration below for more front panel information. For detailed LED descriptions, refer to
page 2-13. For information on the chassis rear panel, refer to page 2-15.
Combo SFP Connectors
The OS6800-48L provides four combo SFP connectors for 1000Base-X high-speed connections.
By default, when an SFP is installed in a combo port, it takes over the port number of the corresponding RJ-45 Ethernet port. In other words, if an SFP is installed in the slot labeled 45, Ethernet port 45 is no longer available and
Status and Slot Indicator LEDs
For detailed information on OS6800­48L status and slot indicator LEDs, refer to page 2-13.
OmniSwitch 6800-48L
OK
PWR
FAN
XFP1 XFP2
Speed 1
PRI
BPS
TMP
Speed 2
34567891011
13
12
10/100Mbps and 10/100/1000 Ports
The OS6800-48L provides 44 fixed 10/100BaseT non combo ports (1–44) and 4 fixed 10/100/1000BaseT combo ports (45–48). These ports are auto-sensing and auto-MDIX and use RJ-45 connectors.
15
1614
cannot be used for 10/100/1000 traffic. This default setting is referred to as “preferred fiber.” Refer to “Configuring Ethernet Ports” in the Network Configuration Guide for detailed information, including steps for configur­ing combo port settings.
17181920212223
25
24
26
272829303132333435
394041424344454647 LINK/ACT
37
38
36
48 LINK/ACT
46
48
46
48
45 47
46 48
Console Port
The OS6800-48L front panel provides one RJ-45 port for console connections. Con­sole connections are used by network administrators for switch management. This female RJ-45 connector provides a DTE console connection.
Console
OmniSwitch 6800-48L Front Panel
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-11
OmniSwitch 6800-48L OmniSwitch 6800 Series Chassis and Hardware Components
OS6800-48L Specifications
Total 10/100Base-T ports per
44 switch
Total 10/100/1000Base-T
4 combo ports per switch
Total combo SFP connectors per
4 switch
Total 10/100Base-T ports per
352 (stack of eight switches) stack
Total combo SFP connectors per
32 (stack of eight switches) stack
Fabric capacity 160 Gbps Power 150W AC/DC power supply, providing +12V @ 12.5A;
90-264VAC50-60 Hz universal input Total available power supplies 2 (one factory-installed power supply and
one optional backup power supply) Flash memory size 64 MB RAM memory size 256 MB SDRAM Overall Width (rack-mount
19 inches, approx. flanges included)
Chassis Width (rack-mount
17.32 inches
flanges not included) Height 1.73 inches Height (rack units) 1 RU Chassis Depth 16.73 inches Weight 14.41 lbs. (6.54 Kg) Humidity 5% to 90% Relative Humidity (Operating)
0% to 95% Relative Humidity (Storage) Operating Temperature 0 to 45 degrees, Celsius Storage Temperature -20 to 70 degrees, Celsius Altitude Operating altitude: sea level at 40 degrees, Celsius and
10000 feet at 0 degrees, Celsius
Storage altitude: sea level at 40000 feet
page 2-12 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Status LEDs

Status LEDs

LEDs provide visual status information. These “status lights” are used to indicate conditions such as hardware and software status, primary role status (stacked configurations), power supply status, fan and temperature errors, 10 Gigabit uplink status (when applicable), slot number information, data speed, link integrity, and activity. Refer to the diagram below for detailed information on LED states.
Ethernet Port LEDs
10/100 and 10/100/1000 Ethernet ports have two built-in status LEDs. These LEDs indicate the data speed and link/activity status for each corresponding Ethernet port. 1000 Mbps SFP connectors have a single LED for activity. See
page 2-14 for more information.
Data Speed LED
OmniSwitch 6800-48
OK
PWR
FAN
XFP1 XFP2
Speed 1
PRI
BPS
TMP
Speed 2
34567891011
System Status LEDs
OK. Solid green when the
switch has passed hardware diagnostic tests and the sys­tem software is operational. Solid amber when a hardware or system software failure occurs. Blinks amber when the software is in a transi­tional state (e.g., when soft­ware is being downloaded to the switch).
PRI. Solid green when the switch is either a stand-alone switch or the primary switch in a stack; solid amber if the switch status is secondary; off if the switch is idle (i.e., nei­ther primary nor secondary).
37
Link/Activity LED
Slot Indicator LED
The slot indicator LED displays the switch’s current slot number in a stacked configuration (i.e., 1 – 8). Displays 0 when the switch is booting. Blinks 1–8 if the switch is in pass-through mode (see page 3-11).
15
13
12
PWR. Solid green when the primary (i.e., factory­installed) power supply status is OK and the power supply is operating normally. Solid amber in the event of a power supply failure.
BPS. Solid green when an optional redundant power supply is installed and opera­tional. Solid amber if no redundant power supply is installed, or if a redundant power supply failure occurs.
17181920212223
1614
272829303132333435
25
24
26
37
38
36
TMP. Solid green when the switch is operating within the allowed temperature range; displays solid amber if a tem­perature error occurs (i.e., the switch is operating outside the temperature range).
XFP1. Displays the status of the 10 Gigabit port installed in the first XFP connector (located on the switch’s rear panel). Solid green when the port is up. Blinks green when the port is transmitting or
receiving packets in a link up FAN. Solid green when all fans are running at normal
state. Off when no link is
detected. speed. Solid amber if a fan error occurs (i.e., one or more fans are not running at normal speed).
XFP2. Displays the status of
the 10 Gigabit port installed
in the second XFP connector
(located on the switch’s rear
panel). Solid green when the
port is up. Blinks green when
the port is transmitting or
receiving packets in a link up
state. Off when no link is
detected.
Front Panel LED Descriptions (OS6800-48 Shown)
394041424344454647 LINK/ACT
48 LINK/ACT
Combo Port Status LEDs
Displays solid green when an SFP is installed in the corresponding port and a link state exists; blinks green when transmitting or receiving traffic; off when no activity is present or no SFP is installed.
By default, when an SFP is installed, it takes over the port number of the corre­sponding RJ-45 Ethernet port. If an SFP is installed in the slot labeled 45, Ethernet port 45 is no longer avail­able and cannot be used for 10/100/1000 traffic. For detailed information on changing combo port set­tings, see “Configuring Ethernet Ports” in the Net- work Configuration Guide.
45
47
46
48
45 47
46 48
Console
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-13
Status LEDs OmniSwitch 6800 Series Chassis and Hardware Components

10/100/1000 LEDs

There are two LEDS on 10/100/1000 ports. The left-hand LED is the data speed LED. Displays solid green for 1000 Mbps; displays amber for 100 Mbps; off for 10 Mbps or no traffic flow. The right-hand LED is the link/activity status LED. Displays solid green when a link state exists; blinks green to show activity (transmitting or receiving traffic); off when no activity is present.

1000 SFP LEDs

There is a single LED for 1000 Mbps SFP connectors. Displays solid green for a valid link; blinks green when transmitting or receiving packets in a link up state; off when no link is detected.

10/100 LEDs

There are two LEDS on 10/100 ports. The left-hand LED is the data speed LED. Displays solid green for 100 Mbps; displays amber for 10 Mbps; off for no traffic flow. The right-hand LED is the link/activity status LED. Displays solid green when a link state exists; blinks green to show activity (transmitting or receiving traffic); off when no activity is present.
page 2-14 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Rear Panel

Rear Panel

The rear panel of OmniSwitch 6800 Series switches contains the following major components:
Factory-installed power supply and power connector socket (all OmniSwitch 6800 Series switches)
Backup power supply bay for optional OS6800-BPS-225 power supply (all OmniSwitch 6800 Series
switches)
Stacking ports (all OmniSwitch 6800 Series switches except for the OmniSwitch 6800-U24)
10 Gigabit XFP module connector (all OmniSwitch 6800 Series switches except for the OmniSwitch
6800-24 and OmniSwitch 6800-24L)
Stacking Ports A and B
Connector ports for use in stacking OmniSwitch 6800
Power Connector Socket Type IEC-320-C13. Supports one 10 amp power cord. OmniSwitch 6800 Series switches do not provide on/off switches; the power cord is the switch’s only disconnect device.
It is recommended that you use only Alcatel-Lucent provided power cords.
Series switches into a virtual chassis. For detailed information on stacking switches, refer to page 2-22, as well as “Managing OmniSwitch 6800 Series
Stacks” on page 3-1.
Note: The OS6800-U24 does not support stacking. On these switches, this section of the rear panel is blank.
Backup Power Supply Bay
Slot for optional user-installable OS6800­BPS-225 backup power supply connector. For more information on the backup power supply, refer to the sections, “OS6800-BPS-SHLF
Backup Power Supply Shelf” on page 2-40
and “OS6800-BPS-225 225W Backup Power
Supply” on page 2-42.
OmniSwitch 6800 Series Rear Panel
Stack A Stack B
10 Gigabit XFP Module Slot
Reserved for use with two-port 10 Gigabit XFP module. Refer to “OS6800-XNI-U2 10 Gigabit
Expansion Module” on page 2-34 for more informa-
tion.
Note: The 10 Gigabit XFP Module is not supported on OS6800-24 and OS6800-24L switches. On these switches, this section of the rear panel is blank.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-15
Mounting the Switch OmniSwitch 6800 Series Chassis and Hardware Components

Mounting the Switch

Note. If you are relocating the switch, be sure to power it down and remove all network, stacking, and power cables before moving.

Airflow Considerations

Be sure that your switch is placed in a well-ventilated, static-free environment. Always allow adequate clearance at the front, rear, and sides of the switch.
The following diagram shows recommended minimum clearances for adequate chassis airflow and access to components at the rear of the chassis—e.g., backup power supply connectors and power cord(s).
Rear Recommended 5 inches minimum at rear of chassis for access to backup power supply connectors and power cord(s).
}
Sides 2 inches minimum at left and right sides for adequate air­flow. For detailed information on chassis airflow, refer to page 2-17.
Front Recommended 6 inches minimum at front of chassis for access to LEDs and network
}
cables.
OmniSwitch 6800 Series Chassis Top View
Note. Never obstruct the air vents located at the sides of the chassis. Obstructing these vents can cause
switch failure. Clearance is not required at the top and bottom of the chassis. For detailed chassis airflow diagrams, refer to “Chassis Airflow” on page 2-17.
page 2-16 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Mounting the Switch
Chassis Airflow
The fans pull air from the air intake vent located at the left-hand side of the chassis. The air is directed horizontally through the chassis and past the circuit board. Airflow is then exhausted through the fan vents at the right-hand side of the chassis. Refer to the illustrations below for more information.
1. Air Intake. The six chassis fans pull air from the main air intake vent located at the left­hand side of the chassis.
2. Airflow. The air from the intake vent is directed through the chassis past the circuit board. This airflow provides required cooling for chassis components.
3. Air Exhaust. The airflow is exhausted through the six fan exhaust vents at the right­hand side of the chassis.
Left Side Air Intake Vent
Front of Chassis
Air Intake Vent
3
2
1
2
1
T
2
C A /
K N I L
3 2
3
2
onsole
C
1 2
4
2 9 1
2
2
7 1
2
4
2
2
T C A
/
K IN L
5 1
4 2
2
3
2
1
0 2
8 1
6 1
4
1
1
1
9
7
5
2
1
3
0
1
1
d e e p
S
8
6
4
2 d e
e p
S
I R P
S
P
K
B
O
P M
R
T
W P
N A F
Front of Chassis
Fan Exhaust Vents
Right Side Fan Exhaust Vents
Important. Maintain a clearance of at least two inches at the left and right sides. Otherwise, airflow may
become restricted. Restricted airflow can cause your switch to overheat; overheating can lead to switch failure. See “Airflow Considerations” on page 2-16 for more information on chassis clearances.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-17
Mounting the Switch OmniSwitch 6800 Series Chassis and Hardware Components

Blank Cover Panels

Blank cover panels are provided with your switch and are used to cover empty backup power supply bays and 10 Gigabit uplink bays (all OmniSwitch 6800 Series switches except for the OmniSwitch 6800-24 and OmniSwitch 6800-24L). These cover panels play an important role in chassis airflow and temperature management. They also protect the switch’s processor board and other sensitive internal switch compo­nents from physical damage by closing off the chassis.
When blank cover panels are missing, air does not take the direct route from the air intake vent, through the chassis, and then out through the fan exhaust vents (see page 2-17). Instead, a portion of the airflow is allowed to be drawn in through the rear of the chassis. As a result, normal airflow is disrupted and an extra task is placed on the fans to cool the chassis.
If your switch is not equipped with a backup power supply connection or 10 Gigabit uplink, and blank cover panels are not installed over empty bay locations, airflow is adversely affected. Because they regu­late airflow and help protect internal chassis components, blank cover panels should remain installed over empty rear panel bays at all times.
page 2-18 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Mounting the Switch

Installation Options

There are two ways in which the OmniSwitch 6800 Series switches can be installed:
Tabletop installation
Rack-mount installation
Installing the Switch on a Tabletop or Bench
OmniSwitch 6800 Series switches can be installed freestanding as tabletop units. Place your switch on a stable, flat, static-free surface.
Note. OmniSwitch 6800 Series switches must be placed “right side up.” Never attempt to operate a switch positioned on its side.
Tabletop Mounting Steps
To install the switch as a tabletop unit, follow the steps below:
1 Position the chassis on the table or bench where it is to be installed.
2 Be sure that adequate clearance has been provided for chassis airflow and access to the front, back, and
sides of the switch. For recommended clearances, refer to page 2-16. Also, be sure that you have placed the chassis within reach of all required AC power sources.
3 If you are installing a single (i.e., stand-alone) switch, continue to “Booting OmniSwitch 6800 Series
Switches” on page 2-25 for additional setup procedures.
If you are placing multiple switches in a stacked configuration, carefully stack the remaining switches, one on top of the other. Up to eight switches may be stacked to form a single virtual chassis. Be sure to main­tain adequate clearance at the front, rear, left, and right side of all switches (see page 2-16). Also, be sure that you have placed all switches in the stack within reach of required AC power sources. Once the switches are stacked together, continue to “Cabling Stacked Configurations” on page 2-22 for additional setup procedures.
Note. For comprehensive information on operating switches in a stacked configuration, refer to Chapter 3,
“Managing OmniSwitch 6800 Series Stacks.”
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-19
Mounting the Switch OmniSwitch 6800 Series Chassis and Hardware Components
Rack-Mounting the Switch
Refer to the important guidelines below before installing the OmniSwitch 6800 Series chassis in a rack.
It is recommended that two people install the switch in the rack—one person to hold the chassis and
position it in the rack, and a second person to secure the chassis to the rack using attachment screws (not supplied).
Alcatel-Lucent provides two rack-mount flanges with each OmniSwitch 6800 Series switch. These
flanges support standard 19-inch rack mount installations. These flanges must be attached to the chas­sis before the switch can be rack mounted.
Note. If you are installing the switch in a 23-inch wide rack, Alcatel-Lucent offers optional 23-inch rack­mounting hardware. For more information, contact your Alcatel-Lucent representative.
Alcatel-Lucent does not provide rack-mount screws. Use the screws supplied by the rack vendor.
To prevent a rack from becoming top heavy, it is recommended that you install heavier equipment at
the bottom of the rack whenever possible.
If you are installing the switch in a relay rack, be sure to install and secure the rack per the rack
manufacturer’s specifications.
Review page 2-16 for important chassis airflow and access recommendations before installing.
Rack Mounting Steps
To rack-mount the switch, follow the steps below:
1 Align the holes in the provided rack-mount flanges with the four threaded holes in the OmniSwitch
6800 Series chassis. These threaded holes are located in the left and right sides of the chassis, near the front panel.
2 Attach the flanges to the chassis using the provided Phillips-head screws. Be sure to tighten each of the
screws firmly using a Phillips screwdriver.
PRI
PS
K
B
O
P
R
TM
PW
N
FA
Attaching a Rack-Mount Flange
page 2-20 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Mounting the Switch
3 After the rack-mount flanges are secured to the chassis, mark the holes on the rack where the switch is
to be installed.
4 Lift and position the switch until the rack-mount flanges are flush with the rack post.
5 Align the holes in the flanges with the rack holes that were marked in step 3.
6 Once the holes are aligned, insert a rack mount screw (not provided) through the bottom hole of each
flange. Tighten both screws until they are secure.
3 2
1
2
1 2
T C
/A K IN
L 3 2
3 2
1 2
9 1
7 1
5 1
3
1
6 1
4
1
4 2
2 2
0 2
8 1
Cons ol e
4
2
2 2
2
4
2
2
T
C A /
K
IN
L
Attaching the Switch to the Rack
Note. Be sure to install the screws in the bottom hole of each flange, as shown, before proceeding.
7 Once the screws at the bottom of each flange are secure, install the remaining two rack mount screws.
Be sure that all screws are securely tightened.
Note. If you are installing multiple switches in a rack to form a stacked configuration, refer to “Setting Up
a Stacked Configuration” on page 2-22.

Installing and Removing Combo Port SFPs

OmniSwitch 6800 Series switches offer four Gigabit Ethernet combo ports, located on the front panel (see
page 2-3 and page 2-5). These combo ports support hot-swappable fiber Small Form-Factor Pluggables
(SFPs). For instructions on installing and removing combo port SFPs, refer to the instruction card provided with the SFP product.
Note. Combo port preferences are user-configurable via the system software. Refer to the “Configuring Ethernet Ports” in the OmniSwitch 6800 Series Network Configuration Guide for complete details.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-21
Setting Up a Stacked Configuration OmniSwitch 6800 Series Chassis and Hardware Components

Setting Up a Stacked Configuration

Rack Mounting Stacked Configurations

To rack mount a stacked configuration, install all switches that are to be included in the stacked configura­tion as described on pages 2-20 through 2-21. Up to eight switches may be stacked to form a single virtual chassis.
Note. When rack mounting multiple switches in a stacked configuration, be sure to place all switches in vertically-adjacent rack positions. This will ensure that all required stacking cables will have adequate length for the installation.
Important Note. OmniSwitch 6800-U24 switches do not support stacking.

Cabling Stacked Configurations

In order to connect stacked switches into a virtual chassis, all modules in the stack must be connected via stacking cables (provided).
Redundant Stacking Cable Connections
In addition to the stacking cables installed between adjacent switch, the top-most switch and bottom-most switch in the stack must be connected using a redundant stacking cable. Refer to Chapter 3, “Managing
OmniSwitch 6800 Series Stacks” for more information on the redundant stacking cable connection.
Supported Cabling Patterns
Each switch provides two stacking ports: stacking port A and stacking port B. Cables can be connected in any pattern. In other words, the cable connected to stacking port A of one switch can be connected to either stacking port A or stacking port B of the adjacent switch. However, it is strongly recommended that the cabling pattern remains consistent across the stack. For a cabling diagram and additional information on cabling the stack, refer to Chapter 3, “Managing OmniSwitch 6800 Series Stacks.”
Cabling Steps
1 Before inserting a stacking cable into one of the stacking ports, be sure to orient the stacking cable
connector properly. The wide portion of the connector must be facing up. Refer to the diagram below for more information.
Connector Top
When orienting the stacking cable connector, be sure that the wider portion of the connector is facing up, as shown. Otherwise, the stacking cable will not fit properly in the chassis’ stacking port.
End View of Stacking Cable Connector
page 2-22 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Setting Up a Stacked Configuration
2 Starting from the top of the stack, insert one end of the stacking cable into either stacking port A or
stacking port B. The stacking port (A or B) depends on your preferred cabling pattern. Refer to Chapter 3,
“Managing OmniSwitch 6800 Series Stacks” for detailed information on cabling patterns. Be sure that
cable connector is completely inserted and fully seated in the chassis.
3 Insert the other end of the stacking cable into the stacking port of the switch immediately below. Once
again, the stacking port (A or B) depends on the preferred cabling pattern.
4 Repeat this procedure until all switches in the stack are connected (see illustrations a, b, and c below).
Reminder. The diagram below shows one supported stacking cable pattern. For additional supported cabling patterns, refer to Chapter 3, “Managing OmniSwitch 6800 Series Stacks.”
a
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-23
b
Connecting the Switches in the Stack
c
Setting Up a Stacked Configuration OmniSwitch 6800 Series Chassis and Hardware Components
5 To provide added resiliency and redundancy, you must install the redundant stacking cable to connect
the top switch in the stack to the bottom switch. Connect the redundant cable now. Refer to the diagram below for more information.
Redundant Connection Between Top and Bottom Switches
6 Once all stacking cable connectors are inserted, tighten the captive screws at the left- and right-hand
sides of each connector, as shown. Be sure not to overtighten the screws.
Tightening Stacking Connector Captive Screws
7 Now that all switches in the stack are connected, continue to “Booting OmniSwitch 6800 Series
Switches” on page 2-25.
page 2-24 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Booting OmniSwitch 6800 Series Switches

Booting OmniSwitch 6800 Series Switches

For information on booting stand-alone switches and switches in stacked configurations, refer to the sections below.

Booting a Stand-alone Switch

The OmniSwitch 6800 Series switch does not use an on/off switch. The power cord is the switch’s only connect/disconnect device. The power connector socket is located on the switch’s rear panel. For more information, refer to “Rear Panel” on page 2-15.
To boot the switch, plug the power cord (provided) into the power connector socket at the switch’s rear panel. Next, plug the power cord into an easily-accessible power source, such as a grounded AC outlet or an Uninterruptible Power Supply (UPS).
The switch immediately begins the boot process. Allow a few moments for the switch to boot completely, then verify the status of all LEDs on the switch’s front panel. A successful boot for a stand-alone switch displays the following LED states:
LED States for a Stand-alone Switch
OK Solid green PRI Solid green PWR Solid green BPS Solid amber if no operational backup power supply (BPS) is attached;
solid green if an operational BPS is attached. See page 2-40 for more
information. FAN Solid green TMP Solid green XFP1 Off (applies to all OmniSwitch 6800 Series switches except for the
OmniSwitch 6800-24 and OmniSwitch 6800-24L) XFP2 Off (applies to all OmniSwitch 6800 Series switches except for the
OmniSwitch 6800-24 and OmniSwitch 6800-24L) Slot Indicator 1–8 (non-blinking), depending on the slot number value in the
boot.slot.cfg file. See Chapter 3, “Managing OmniSwitch 6800 Series
Stacks” for detailed information. The default value is 1.
If any of the LED state differs from the states shown in the table above, refer to page 2-13 for more infor­mation. Contact Alcatel-Lucent Customer Support if the LED state persists.
For information on logging in and configuring your OmniSwitch 6800 Series switch, refer to the OmniSwitch 6800 Series Getting Started Guide and OmniSwitch 6800 Series Switch Management Guide.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-25
Booting OmniSwitch 6800 Series Switches OmniSwitch 6800 Series Chassis and Hardware Components

Booting Stacked Configurations

Once the switches have been connected into a virtual chassis, the next step is to manually power on the stack. The OmniSwitch 6800 Series switch does not use an on/off switch. The power cord is the switch’s only connect/disconnect device. The power connector socket is located on the switch’s rear panel. For more information, refer to “Rear Panel” on page 2-15.
To boot the stack, plug the power cord (provided) into the power connector socket at the rear panel of each switch in the stack. Next, plug all power cords, in rapid succession, into easily-accessible power sources, such as grounded AC outlets or an Uninterruptible Power Supply (UPS).
Note. Be sure to power on all switches in the stack in rapid succession; otherwise, switches may be assigned unintended stack management roles. Refer to Chapter 3, “Managing OmniSwitch 6800 Series
Stacks” for detailed information.
The stack immediately begins the boot process. Allow a few moments for all elements in the stack to boot completely, then verify the status of all LEDs on the switch’s front panel. A successful boot for a stand-alone switch displays the following LED states.
LED States for a Stacked Configuration
OK Solid green for all switches PRI Solid green for the primary management module; solid amber for the
secondary management module; off for switches operating in idle roles.
Detailed information for primary, secondary, and idle roles is provided
in Chapter 3, “Managing OmniSwitch 6800 Series Stacks.” PWR Solid green for all switches BPS Solid amber for any switch without an operational backup power sup-
ply (BPS) attached; solid green for any switch with an operational BPS
attached; See page 2-40 for more information. FAN Solid green for all switches TMP Solid green for all switches XFP1 Off for all switches (applies to all OmniSwitch 6800 Series switches
except for the OmniSwitch 6800-24 and OmniSwitch 6800-24L) XFP2 Off for all switches (applies to all OmniSwitch 6800 Series switches
except for the OmniSwitch 6800-24 and OmniSwitch 6800-24L) Slot Indicator 1–8 (non-blinking), depending on the slot number assignment for each
corresponding switch. See Chapter 3, “Managing OmniSwitch 6800
Series Stacks” for detailed information.
If any of the LED state differs from the states shown in the table above, refer to page 2-13 for more infor­mation. Contact Alcatel-Lucent Customer Support if the LED state persists. For information on logging in and configuring your OmniSwitch 6800 Series stack, refer to the OmniSwitch 6800 Series Getting Started Guide and OmniSwitch 6800 Series Switch Management Guide.
page 2-26 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Power Cords
Note. Chapter 3, “Managing OmniSwitch 6800 Series Stacks,” provides important information on virtual
chassis behavior during and after a boot. Consulting this chapter is strongly recommended for users oper­ating switches in a stacked configuration.

Power Cords

Because the power cord is the switch’s only disconnect device, it should be plugged into an easily accessible outlet. In the event that your power cord is lost or damaged, refer to the specifications below.
Specifications
The power cord to be used with 115-Volt configuration is a minimum type SJT (SVT) 18/3, rated at 250 Volts AC, 10 Amps with a maximum length of 15 feet. One end terminates in an IEC 320 attachment plug and the other end terminates in a NEMA 5-15P plug.
The power cord to be used with 230-Volt configuration is minimum type SJT (SVT) 18/3, rated 250 Volts AC, 10 Amps with a maximum length of 15 feet. One end terminates in an IEC 320 attachment plug and the other end terminates as required by the country where it will be installed.
European cords must be Harmonized (HAR) type. Refer to the information below for power plug types by region:
Power Cord Types
North America NEMA 5-15-P (US), C22.2, No. 42 (Canada) United Kingdom / Ireland BS 1,363 Europe CEE 7/7 Japan JIS 8,303 Australia AS 3,112 India BS 546 Italy CIE 2,316 Switzerland / Liechtenstein SEV 1011 Denmark / Greenland SRAF 1,962 / D816 / 87 Argentina AR1-10P
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-27
Console Port OmniSwitch 6800 Series Chassis and Hardware Components

Console Port

The console port, located on the chassis front panel, provides a console connection to the switch and is required when logging into the switch for the first time. By default, this RJ-45 connector provides a DTE console connection.

Serial Connection Default Settings

The factory default settings for the serial connection are as follows:
baud rate 9600 parity none data bits (word size) 8 stop bits 1 flow control none

Modifying the Serial Connection Settings

The switch’s serial connection defaults are listed above. If you wish to modify the default serial connection settings (i.e., baud rate, parity, data bits, and stop bits), refer to the following steps:
Note. You must be connected to the switch via the console port before attempting to change serial connec­tion settings. Otherwise, an error message will display.
For switches in a stacked configuration, all changes must be configured before the switches are cabled together. In other words, you must configure these settings when each switch is operating as a stand-alone unit.
1 Enter the modify boot parameters command at the CLI prompt. The boot prompt displays:
Boot >
2 To change the baud rate, enter boot serialbaudrate, followed by the desired baud rate value. Options
include 1200, 2400, 4800, 9600 (default), 19200, 38400, 57600, 76800, and 115200. For example:
Boot > boot serialbaudrate 19200
Note. Setting the console port to speeds above 9600 baud can cause problems with Zmodem uploads.
3 To change the parity value, enter boot serialparity, followed by the desired parity value. Options
include none (default), even, and odd. For example:
Boot > boot serialparity even
4 To change the data bits (i.e., word size) value, enter boot serialwordsize, followed by the number of
data bits. Options include 7 and 8 (default). For example:
Boot > boot serialwordsize 7
page 2-28 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Console Port
5 To change the stop bits value, enter boot serialstopbits, followed by the number of stop bits. Options
include 1 (default) and 2. For example:
Boot > boot serialstopbits 2
6 Verify your current changes by entering show at the boot prompt:
Boot > show Edit buffer contents: Serial (console) baud : 19200 Serial (console) parity : even Serial (console) stopbits : 2 Serial (console) wordsize : 7
(additional table output not shown)
7 You can save your changes to the boot.params file by entering commit file at the boot prompt:
Boot > commit file
When the commit file command is used, changes will not be enabled until after the next switch reboot.
8 You can also save your changes in real time to the switch’s running memory by entering commit
system at the boot prompt:
Boot > commit system
Caution. There are two important things to consider when using the commit system command to save serial connection changes:
Output to the terminal may become illegible due to incompatible serial connection settings between the
switch and the terminal emulation software.
If you use the commit system command only, changes will not be saved to the switch’s boot.params
file and will be lost if the switch is rebooted. To save changes to the boot.params file, refer to step 7.
9 Return to the CLI prompt by entering exit at the boot prompt.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-29
Console Port OmniSwitch 6800 Series Chassis and Hardware Components

Console Port Pinouts

RJ-45 Console Port – Connector Pinout
Pin Number Signals as DTE Console Port
1NC 2NC 3RXD 4Ground 5Ground 6TXD 7NC 8NC
page 2-30 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Monitoring the Chassis

Monitoring the Chassis

OmniSwitch 6800 Series switches can be monitored and managed via the console port using Command Line Interface (CLI) commands. The switches can also be monitored and managed via the Ethernet ports using CLI commands, WebView, SNMP, and OmniVista.
The section below provides some examples of useful hardware-related monitoring CLI commands. Refer to the OmniSwitch CLI Reference Guide for detailed information on all management and monitoring commands used with the OmniSwitch 6800 Series switch. For comprehensive information on managing and monitoring stacked configurations, refer to Chapter 3, “Managing OmniSwitch 6800 Series Stacks.”

Checking Overall Chassis Status

To check the overall status of a chassis, including the chassis type, and current administrative and opera­tional status, use the show chassis command. For example:
-> show chassis
Chassis 1 Model Name: OS6800-48, Description: 10/100/1000, Part Number: 902274-10, Hardware Revision: 005, Serial Number: 439L0024, Manufacture Date: SEP 22 2004, Admin Status: POWER ON, Operational Status: UP, Number Of Resets: 1
When the show chassis command is issued for a stacked configuration, status information for all switches in the stack displays. For a complete list of output definitions for this command, refer to the OmniSwitch CLI Reference Guide.

Checking Temperature Status

To check chassis temperature status, including the current temperature and configured threshold values, use the show temperature command. For example:
-> show temperature
Temperature for chassis 1 Hardware Board Temperature (deg C) = 38, Hardware Cpu Temperature (deg C) = N/A, Temperature Upper Threshold Range (deg C) = 30 to 72, Temperature Upper Threshold (deg C) = 57, Temperature Range = UNDER THRESHOLD, Temperature Danger Threshold (deg C) = 72
When the show temperature command is issued for a stacked configuration, status information for all switches in the stack displays. For a complete list of output definitions for this command, refer to the OmniSwitch CLI Reference Guide.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-31
Monitoring the Chassis OmniSwitch 6800 Series Chassis and Hardware Components

Checking Fan Status

To check the current status for all six fans in the chassis, use the show fan command. For example:
-> show fan Chassis Fan Status
-------+---+----------­ 1 1 Running 1 2 Running 1 3 Running 1 4 Running 1 5 Running 1 6 Running
When the show fan command is issued for a stacked configuration, status information for all switches in the stack displays. For a complete list of output definitions for this command, refer to the OmniSwitch CLI Reference Guide.

Checking Power Supply Status

For information on checking power supplies for stand-alone and stacked OmniSwitch 6800 Series switches, refer to “Viewing Primary and Backup Power Supply Status” on page 2-53.

Additional Monitoring Commands

CLI Commands Used for Monitoring a Chassis
show cmm Displays basic hardware and status information for primary and
secondary management modules (if applicable).
show ni Displays basic hardware and status information for individual modules.
If the switch is a stand-alone, information for the stand-alone switch
displays.
show module Displays basic information for individual modules. If the switch is a
stand-alone, information for the stand-alone switch displays.
show module long Displays detailed information for individual modules. If the switch is a
stand-alone, information for the stand-alone switch displays.
show module status Displays basic status information for individual modules. If the switch
is a stand-alone, information for the stand-alone switch displays.
page 2-32 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Monitoring the Chassis

Using LEDs to Visually Monitor the Chassis

The front panel of OS6800-24 and OS6800-48 switches provides status LEDs that are useful in visually monitoring the status of stand-alone switches, as well as switches stacked into a virtual chassis. Front panel LEDs include:
Ethernet Port LEDs
Slot Indicator LED
System Status LEDs
Combo Port Status LEDs
For tables showing LED states for switches and stacks operating normally, refer to pages 2-25 and 2-26. For detailed information on all OmniSwitch 6800 Series LEDs, refer to page 2-13.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-33
OS6800-XNI-U2 10 Gigabit Expansion Module OmniSwitch 6800 Series Chassis and Hardware Components

OS6800-XNI-U2 10 Gigabit Expansion Module

OmniSwitch 6800-48, 6800-U24, and 6800-48L switches support a 10 Gigabit expansion module (OS6800-XNI-U2). The slot for the expansion module is located at the rear panel of the switch chassis. The 10 Gigabit Ethernet expansion module supports up to two 10 Gbps Small Form Factor Pluggable (XFP) optical transceivers. XFPs are ordered separately and are available for short-reach and long-reach applications. (See page 2-39 for more information on XFPs.)
Important. The OS6800-XNI-U2 10 Gigabit expansion module cannot be hot swapped. Attempting to hot swap the expansion module will result in a reboot of the switch and may interrupt network data flow.
XFP Connectors
The OS6800-XNI-U2 module provides two ports for 10 Gbps Small Form Factor Pluggable (XFP) transceivers. For additional information on XFPs, refer to page 2-39.
XFP Status LEDs
The 10 Gigabit expansion module provides two LEDs (XFP1 and XFP2) for monitoring XFP link status and activity. Each LED displays solid green when its corresponding port is up; each LED blinks green when the corresponding port is transmitting or receiving packets in a link up state. The LEDs are off when no link is detected.
Note that provide XFP status LEDs on the chassis front panel for easier visibility. The function of chassis front panel LEDs is identical to the LEDs included on the expansion module.
OmniSwitch 6800-48, 6800-U24, and 6800-48-L switches
10 Gigabit Expansion Module Front Panel
10 Gigabit Expansion Module Specifications
Number of ports 2 Power consumption 16W (with two XFPs installed) Data Speed Approximately 10.3 Gbps (per port) Transceiver Type Supported XFP Chassis port locations 49 and 50 (OS6800-48, OS6800-48L);
25 and 26 (OS6800-U24)
page 2-34 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components OS6800-XNI-U2 10 Gigabit Expansion Module

10 Gigabit Slot and Port Numbering

Slot Numbering
The slot number for the 10 Gigabit expansion module is defined by the position of the OS6800 chassis in a stacked configuration. For example, if a switch is assigned slot 3, an expansion module installed in the same chassis is also designated slot 3. For stand-alone switches, the default slot number is 1.
To verify a switch’s current slot number, refer to the slot number LED on the chassis front panel or issue the show module long command and locate the module with the relevant 10 Gigabit expansion module installed.
Port Numbering
The port numbers for the 10 Gigabit expansion module are defined by a switch’s chassis type. 10 Gigabit ports installed in OS6800-48 and OS6800-48L switches are assigned port numbers 49 and 50; 10 Gigabit ports installed in OS6800-U24 switches are assigned port numbers 25 and 26.
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Slot 1
Slot 2
Slot 3 10 Gigabit module installed
Slot 4
In this example diagram, OS6800-48/OS6800-48L chassis types are shown. The OS6800-U24 chassis does not support stacking.
Slot/port numbering for the 10 GigE ports is
3/49
Expansion Module Slot/Port Numbering Example

10 Gigabit Expansion Modules and Token Usage

As with OmniSwitch 6800 and OmniSwitch 6800L switches, 10 Gigabit expansion modules also use tokens for budgeting stack ASIC resources. Each expansion module operating within a stack uses two tokens. No more than five expansion modules can operate within a stack of OS6800 or OS6800-L switches at any time.
Refer to the “Managing OmniSwitch 6800 Series Stacks” chapter for more information on tokens.
and
3/50
.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-35
OS6800-XNI-U2 10 Gigabit Expansion Module OmniSwitch 6800 Series Chassis and Hardware Components

10 GigE Interoperability Between OS6800 and OS8800 Switches

In order to have 10 Gigabit uplink operability between OS6800 and OS8800 switches, users must issue the
bridge port 10gig os8800optimized command on the OS6800 switch. The command must be issued sepa-
rately for each 10 Gigabit port. The following examples show operability being enabled on both 10 Gigabit ports installed in an OS6800-U24 chassis:
-> bridge port 1/25 10gig os8800optimized enable
-> bridge port 1/26 10gig os8800optimized enable
For more information on specifying 10 Gigabit slot and port numbers, refer to “10 Gigabit Slot and Port
Numbering” on page 2-35.
Note. The bridge port 10gig os8800optimized command applies only to OS6800-48, OS6800-48L, and OS6800-U24 switches being connected to OS8800 switches via a 10 Gigabit uplink. For more informa­tion on this command, refer to the CLI Reference Guide.
Viewing Interoperability Status
To view whether a 10 Gigabit port has been optimized for use with OS8800 switches, use the
show spantree ports command. Be sure to include the keyword configured in the command line.
For example:
-> show spantree 1 ports configured Spanning Tree Port Admin Configuration for Vlan 1 Port Adm Man. Config Adm OS8800 Port Pri St. Mode Cost Cnx 10G Opt.
-----+----+----+----+-------+----+-------­1/1 7 ENA No 0 AUT DIS 1/2 7 ENA No 0 AUT DIS 1/3 7 ENA No 0 AUT DIS 1/4 7 ENA No 0 AUT DIS 1/5 7 ENA No 0 AUT DIS 1/6 7 ENA No 0 AUT DIS 1/7 7 ENA No 0 AUT DIS 1/8 7 ENA No 0 AUT DIS 1/9 7 ENA No 0 AUT DIS 1/10 7 ENA No 0 AUT DIS 1/11 7 ENA No 0 AUT DIS 1/12 7 ENA No 0 AUT DIS 1/13 7 ENA No 0 AUT DIS 1/14 7 ENA No 0 AUT DIS 1/15 7 ENA No 0 AUT DIS 1/16 7 ENA No 0 AUT DIS 1/17 7 ENA No 0 AUT DIS 1/18 7 ENA No 0 AUT DIS 1/19 7 ENA No 0 AUT DIS 1/20 7 ENA No 0 AUT DIS 1/21 7 ENA No 0 AUT DIS 1/22 7 ENA No 0 AUT DIS 1/23 7 ENA No 0 AUT DIS 1/24 7 ENA No 0 AUT DIS 1/25 7 ENA No 0 AUT ENA 1/26 7 ENA No 0 AUT ENA
10 Gigabit/OS8800 optimization is shown enabled on both 10 Gigabit ports in the chassis (an OS6800-U24 in this case).
page 2-36 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components OS6800-XNI-U2 10 Gigabit Expansion Module

Installing 10 Gigabit Expansion Modules

ESD Caution. Before handling the expansion module, you must discharge all static electricity on your person to avoid Electrostatic Discharge (ESD) damage. If using a wrist strap, ensure that the wrist strap touches your skin. Attach the other end of the strap to the chassis.
1 If there is a blank cover panel installed over the expansion module slot position, uninstall it by remov-
ing the two Phillips attachment screws. After the attachment screws have been removed, carefully pry the blank cover panel out and away from the chassis. Set the cover panel and attachment screws aside.
2 Holding the expansion module by the front panel, carefully slide the circuit board into the card guide
located in the chassis slot.
Card Guide
Circuit Board
Expansion Module
Inserting the 10 Gigabit Expansion Module
Note. The module should slide in easily. Do not force the module into the slot. If any resistance is encoun-
tered, ensure that the module is aligned properly in the card guide and try again.
3 Slide the module back until the backplane connector is inserted in the chassis backplane; the module’s
front panel should be flush with the front of the chassis. Do not force the module into the slot. Forcing the module can damage the connectors.
4 Once the module is firmly seated and flush with the chassis front panel, secure the module by tighten-
ing the two captive screws. Be sure not to overtighten the captive screws. If using a screwdriver, the torque used to tighten the screws must not exceed 2.3 foot-pounds.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-37
OS6800-XNI-U2 10 Gigabit Expansion Module OmniSwitch 6800 Series Chassis and Hardware Components

Removing 10 Gigabit Modules

To remove an expansion module from the chassis, follow the steps below:
ESD Caution. Before handling the expansion module, you must discharge all static electricity on your person to avoid Electrostatic Discharge (ESD) damage. If using a wrist strap, ensure that the wrist strap touches your skin. Attach the other end of the strap to the chassis.
1 Loosen the two captive screws, located at the left and right sides of the module’s front panel. If neces-
sary, use a Phillips screwdriver to loosen the screws.
Note. Be sure that both captive screws are completely disengaged from the threaded holes in the chassis before continuing.
2 Once the captive screws are completely disengaged, grasp the handle and slowly pull the module out of
the slot.
Expansion Module
Removing the 10 Gigabit Expansion Module
3 Store the module in a secure location. Placing the module in an anti-static bag is recommended.
Blank Cover Panel Requirement
If you are not replacing the expansion module being removed, be sure to install a blank cover panel (supplied with your switch) over the empty module slot. To install a blank cover panel, follow the steps below:
1 Slide the blank cover panel into the empty slot and insert two Phillips screws (also supplied with the
switch) through the panel and into the threaded holes in the chassis.
2 Once the screws are inserted, fasten the panel to the chassis by tightening the screws. Be sure not to
overtighten the screws.
page 2-38 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Backup Power Supply Components

Installing SFP and XFP Transceivers

For information on installing XFPs and SFPs, refer to the instruction card included with the transceiver.

Backup Power Supply Components

OmniSwitch 6800 Series switches support optional backup power supply components. Components include:
OS6800-BPS-SHLF backup power supply shelf
OS6800-BPS 225W backup power supply module
Backup power supply daughtercard
Backup power supply connector cable
When backup power supply components are installed, the primary (factory-installed) power supply contin­ues to take on the full power load for switch operations. Meanwhile, the backup power supply operates in active standby mode. If the primary power supply fails unexpectedly, the backup power supply automati­cally takes up the full power load without disrupting the switch.
Because the OmniSwitch 6800 Series backup power supply system is chassis-based—with each chassis supporting up to eight backup power supplies—this provides 1:1 redundancy for stacks of up to eight switches.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-39
Backup Power Supply Components OmniSwitch 6800 Series Chassis and Hardware Components

OS6800-BPS-SHLF Backup Power Supply Shelf

The OS6800-BPS-SHLF backup power supply shelf is a separate, rack-mountable chassis offering power supply bays for up to eight 225 watt power supply modules. Each module can be connected to a single OmniSwitch 6800 Series switch—either stand-alone or in a stacked configuration. Refer to the sections below for more information.
OS6800-BPS-SHLF Backup Power Supply Shelf
page 2-40 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Backup Power Supply Components
OS6800-BPS-SHLF Backup Power Shelf Specifications
The table below lists the specifications for the OS6800-BPS-SHLF Backup Power Shelf:
OS6800-BPS-SHLF Backup Power Shelf Specifications
Width (rack-mount flanges not
17.32 inches, approx.
included) Width (including rack-mount
19.125 inches, approx.
flanges) Height 4.325 inches, approx. Height (rack units) 2.5 RU Depth 12 inches, approx. Ambient Temperature 0 to +45 deg C, operating;
-20 to +70 deg C, storage
Humidity 5% to 90% Relative Humidity (Operating)
0% to 95% Relative Humidity (Storage)
Important Note. The OS6800-BPS-SHLF power shelf is an accessory product and can be used only with the OmniSwitch 6800 Series product. Do not attempt to operate the OS6800-BPS-SHLF power shelf with any other product or chassis type.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-41
Backup Power Supply Components OmniSwitch 6800 Series Chassis and Hardware Components

OS6800-BPS-225 225W Backup Power Supply

Up to eight OS6800-BPS-225 225 watt power supplies can be installed in the OS6800-BPS-SHLF power shelf. Each OS6800-BPS-225 provides backup power for one OS6800-24 or OS6800-48 switch.
Power Connector Socket.
Type IEC-320-C13. Supports one 10 amp power cord.
It is recommended that you use Alcatel-Lucent provided power cords only.
Fan Status (Top LED).
Green when the power sup­ply fans are operating under normal conditions.
Solid amber when a fan error is detected (e.g., one or more fans quit unexpectedly.
Off when the power supply is not operating.
Power OK (Bottom LED).
Displays solid green when the power supply is operat­ing normally.
Off when the power supply is not operating.
Power Supply LEDs
Air Intake Vent.
The air intake vent provides cooling and temperature control for the power supply. Maintain a front clearance of at least six inches to ensure proper airflow.
DC Connector Socket.
Connector socket for attaching the OS6800-BPS power supply to the OS6800-24 or OS6800-48 switch chassis.
OS6800-BPS-225 Backup Power Supply
For information on installing a backup power supply module, refer to page 2-46. For information on removing a backup power supply, refer to page 2-48.
page 2-42 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Backup Power Supply Components
OS6800-BPS-225 225W Backup Power Supply Specifications
The table below lists the specifications for the OS6800-BPS-225 backup power supply:
OS6800-BPS-225 225W Backup Power Supply Specifications
Input Voltage 3 A @ 100-240 VAC Input Frequency 50-60 Hz Width 4.3 inches, approx. Height 1.73 inches, approx. Depth 12 inches, approx. Ambient Temperature 0 to +45 deg C, operating;
-20 to +70 deg C, storage
Humidity 5% to 90% Relative Humidity (Operating)
0% to 95% Relative Humidity (Storage)
Important Note. The OS6800-BPS backup power supply is an accessory product and can be used only with the OmniSwitch 6800 Series product. Do not attempt to operate the OS6800-BPS backup power supply with any other product or chassis type.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-43
Backup Power Supply Components OmniSwitch 6800 Series Chassis and Hardware Components

Rack-Mounting the OS6800-BPS-SHLF Power Shelf

Refer to the important guidelines below before installing the OS6800-BPS-SHLF power shelf in a rack.
The power shelf can be installed with either the power supply bays or the fan vents facing out. Screw
holes for rack-mount flanges are provided on either side of the power shelf. As a result, either panel can be considered the front panel, depending on the preferred installation. Note that installations in which the power supplies face out require a longer connector cable distance between the switch chas­sis and the power shelf. Before attempting to install the power shelf in a rack, be sure that the connec­tor cables have adequate reach.
It is recommended that two people install the power shelf in the rack—one person to hold the shelf and
position it in the rack, and a second person to secure the shelf to the rack using attachment screws (not supplied).
Alcatel-Lucent provides two rack-mount flanges with each OS6800-BPS-SHLF power shelf. These
flanges support standard 19-inch rack mount installations. These flanges must be attached to the chas­sis before the power shelf can be rack mounted.
Note. If you are installing the power shelf in a 23-inch wide rack, Alcatel-Lucent offers optional 23-inch rack-mounting hardware. For more information, contact your Alcatel-Lucent representative.
Alcatel-Lucent does not provide rack-mount screws. Use the screws supplied by the rack vendor.
To prevent a rack from becoming top heavy, it is recommended that you install heavier equipment at
the bottom of the rack whenever possible.
If you are installing the power shelf in a relay rack, be sure to install and secure the rack per the rack
manufacturer’s specifications.
Review page 2-16 for important chassis airflow and access recommendations before installing.
Rack Mounting Steps
To rack-mount the power shelf, follow the steps below:
1 Align the holes in the provided rack-mount flanges with the four threaded holes in the power shelf.
These threaded holes are located in the left and right sides of the power shelf, near the front panel.
2 Attach the flanges to the power shelf using the provided Phillips-head screws. Be sure to tighten each
of the screws firmly using a Phillips screwdriver.
Note: The power shelf can be installed with either the power supply bays or the fan vents facing out. Screw holes for rack-mount flanges are provided on either side. This example diagram shows the an installation in which the power supply bays are facing out. Refer to the list of guidelines above for more information.
Attaching a Rack-Mount Flange
page 2-44 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Backup Power Supply Components
3 After the rack-mount flanges are secured to the power shelf, mark the holes on the rack where the
power shelf is to be installed.
4 Lift and position the power shelf until the rack-mount flanges are flush with the rack post.
5 Align the holes in the flanges with the rack holes that were marked in step 3.
6 Once the holes are aligned, insert a rack mount screw (not provided) through the bottom hole of each
flange. Tighten both screws until they are secure.
Attaching the Power Shelf to the Rack
Note. Be sure to install the screws in the bottom hole of each flange, as shown, before proceeding.
7 Once the screws at the bottom of each flange are secure, install the remaining rack mount screws. Be
sure that all screws are securely tightened.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-45
Backup Power Supply Components OmniSwitch 6800 Series Chassis and Hardware Components

Installing a Backup Power Supply In the Power Shelf

Hot-Swapping Backup Power Supplies. Backup power supplies are fully hot-swappable. In other words, you can add a backup power supply to the power shelf at any time without disturbing the switch’s network functions. You are not required to power down the switch.
Installation Steps
To add a backup power supply to the power shelf, follow the steps below:
Anti-Static Warning. Before handling any components, free yourself of static by wearing a grounding strap, or by grounding yourself properly. Static discharge can damage the switch and the backup power supply.
1 If there is a blank cover panel installed at the backup power supply bay, uninstall it by removing the
two Phillips attachment screws. After the attachment screws have been removed, carefully pry the blank cover panel out and away from the chassis. Set the cover panel and attachment screws aside.
2 Be sure that you do not attempt to install the power supply upside down. When orienting the power
supply, note that the power cord socket is located at the left of the power supply and the handle is located at the top of the power supply. For more information, refer to the diagram below.
When orienting the backup power supply, be sure that the handle is at the top, as shown. Otherwise, the module will not fit properly in the power shelf’s power supply bay.
Orienting the Backup Power Supply
Power Supply Top
page 2-46 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Backup Power Supply Components
3 With one hand, grasp the handle at the front of the power supply. Place your other hand under the
power supply casing to support its weight. Carefully insert the rear of the casing into the power supply bay and slide the power supply back along the chassis alignment guide until its connector meets the chassis backplane connector.
Chassis Alignment Guide
Inserting the Backup Power Supply
4 Continue sliding the power supply back until the front panel is flush with the rear panel of the chassis.
Do not force the power supply into the bay. Otherwise you can damage the connectors.
5 Tighten the two captive screws, located at the left and right sides of the power supply’s front panel. Be
sure not to overtighten the captive screws. If you use a screwdriver, the torque used to tighten the screws must not exceed 2.3 foot-pounds.
Tightening the Captive Screws
6 Connect the power supply cord (provided) into an easily accessible power source.
Note. If you are installing multiple backup power supplies in the power shelf, install all remaining units by repeating steps 1 through 6 for each supply.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-47
Backup Power Supply Components OmniSwitch 6800 Series Chassis and Hardware Components

Installing the Backup Power Supply Daughtercard

Once all backup power supplies are installed in the backup power supply shelf, be sure that a backup power supply daughtercard is installed in the rear panel of each switch that is to receive redundant power. For help locating the backup power supply daughtercard bay, refer to “Rear Panel” on page 2-15.
Note. You can install a daughtercard in the chassis at any time without disturbing the switch’s network functions. You are not required to power down the switch.
Anti-Static Warning. Before handling any components, free yourself of static by wearing a grounding strap, or by grounding yourself properly. Static discharge can damage the switch and the backup power supply.
Installation Steps
To install the backup power supply daughtercard in the rear of the chassis, follow the steps below:
1 If there is a blank cover panel installed at the daughtercard bay, uninstall it by removing the two Phil-
lips attachment screws. After the attachment screws have been removed, carefully pry the blank cover panel out and away from the chassis. Set the cover panel and attachment screws aside.
2 When orienting the daughtercard, be sure to keep the circuit board situated toward the bottom.
3 Carefully slide the daughtercard into the bay (located at the rear panel of the chassis—see page 2-15)
until the front panel of the daughtercard is flush with the chassis rear panel and the module is seated securely.
4 Tighten the two captive screws located at the left and right sides of the daughtercard’s front panel. Be
sure not to overtighten the captive screws. If you use a screwdriver, the torque used to tighten the screws must not exceed 2.3 foot-pounds.
5 Repeat steps 1 through 4 for any remaining switches that are to receive redundancy power supply
support.

Installing the Backup Power Supply Connector Cables

Once all backup power supplies are installed in the backup power supply shelf and all daughtercards are installed in the switch chassis, connect one backup power supply connector cable between each power supply and daughtercard.

Powering on the Backup Power Supplies

OmniSwitch 6800 Series backup power supplies do not use on/off switches. The power cord is the supply’s only connect/disconnect device. The power connector socket is located on the supply’s front panel. For more information, refer to “OS6800-BPS-225 225W Backup Power Supply” on page 2-42.
To power on the backup power supply, plug the power cord (provided) into the supply’s power connector socket. Next, plug the power cord into an easily-accessible power source, such as a grounded AC outlet or an Uninterruptible Power Supply (UPS). Repeat this process for each backup power supply installed in the power shelf.
page 2-48 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Backup Power Supply Components

Removing a Backup Power Supply

Note. You can remove a backup power supply from the power shelf at any time without disturbing the switch’s network functions. You are not required to power down the switch.
Anti-Static Warning. Before handling any components, free yourself of static by wearing a grounding strap, or by grounding yourself properly. Static discharge can damage the switch and the backup power supply.
Removal Steps
To remove a backup power supply from the power shelf, follow the steps below:
Note. Before handling any components, free yourself of static by wearing a grounding strap, or by ground­ing yourself properly. Static discharge can damage the switch and the backup power supply.
1 Unplug the power cord from the AC power source, as well as from the socket located on the power
supply’s front panel.
2 Loosen the two captive screws, located at the left and right sides of the power supply’s front panel. If
necessary, use a Phillips screwdriver to loosen the screws.
Note. Be sure that both captive screws are completely disengaged from the threaded holes in the chassis before continuing.
Loosening the Captive Screws
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-49
Backup Power Supply Components OmniSwitch 6800 Series Chassis and Hardware Components
3 Once the captive screws are completely disengaged, grasp both captive screws and slowly pull the
power supply out of the power supply bay.
Removing the Backup Power Supply
4 Store the power supply in a secure, static-free location.
5 Refer to the important blank cover panel requirement on page 2-51.
page 2-50 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Backup Power Supply Components

Removing the Backup Power Supply Daughtercard

Note. You can remove a daughtercard from the chassis at any time without disturbing the switch’s network functions. You are not required to power down the switch.
Anti-Static Warning. Before handling any components, free yourself of static by wearing a grounding strap, or by grounding yourself properly. Static discharge can damage the switch and the backup power supply.
Removal Steps
To remove the daughtercard from the rear of the chassis, follow the steps below:
1 Loosen the two captive screws located at the left and right sides of the daughtercard module.
Note. Be sure that both captive screws are completely disengaged from the threaded holes in the chassis before continuing.
2 Carefully slide the daughtercard out of the bay.
3 Store the daughtercard in a secure, static-free location.
4 Refer to the important blank cover panel requirement below.

Blank Cover Panel Requirement

If you are not replacing any backup power supplies or daughtercard modules being removed, be sure to install a blank cover panel (supplied with your power shelf or switch) over the empty bays. To install a blank cover panel, follow the steps below:
1 Place the blank cover panel over the empty bay and insert two Phillips screws (also supplied with the
power shelf or switch) through the panel and into the threaded holes in the chassis.
2 Fasten the panel to the chassis by tightening the screws. Be sure not to overtighten the screws.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-51
Backup Power Supply Pinouts OmniSwitch 6800 Series Chassis and Hardware Components

Backup Power Supply Pinouts

OS6800-BPS-225 225W Backup Power Supply Connector
Pin Number
1-50 VDC 2Ground 3 Enable 4 RPS_ABNORMAL 5NC
OS6800-BPS-225 225W Backup Power Supply Cable
Pin Number Power Shelf Side Pin Number Switch Side
2 Ground 1 -48 RTN
2NC 3 Enable 3 Enable 2 Ground 4 -48 RTN
5 SYSPWRFAIL_L 1 -50 VDC 6 -48 DC 4 RPS_ABNORMAL 7 RPS_ABNORMAL 1 Ground 8 -48 DC 2 Enable 9 -48 RTN
RPS_ABNORMAL 10 NC
2NC 11-48 RTN
-50 VDC 12 Ground (Secondary) Ground 13 NC
1 Enable 14 -48 VDC
RPS_ABNORMAL 15 NC
1NC 16-48 VDC
page 2-52 OmniSwitch 6800 Series Hardware Users Guide June 2007
OmniSwitch 6800 Series Chassis and Hardware Components Viewing Primary and Backup Power Supply Status

Viewing Primary and Backup Power Supply Status

The switch constantly monitors primary and backup power supply operation. If either the primary or backup power source unexpectedly shuts down, the switch sends out a notification to the user. In addition, the power LED on the chassis front panel and the LED on the backup power supply front panel (if installed) display solid amber.
Note. For detailed OS6800-24 and OS6800-48 LED information, refer to “Status LEDs” on page 2-13.
To check the number of power supplies currently operating, and the status of each power supply, use the
show power command. For example:
-> show power
Power Supplies in chassis 1 PS Operational Status
---------+------------------­PS-1 48V UP PS-2 48V NOT PRESENT
The primary (i.e., factory-installed) power supply is listed as PS-1 in the show power command output. The backup power supply is listed as PS-2. In the example above, there is no backup power supply installed.
Note. For information on viewing primary and backup power supply status in a stacked configuration, refer to page 2-53.

Viewing Power Supply Status for Stacked Configurations

When entering the show power command on the primary switch in a stacked configuration, you can either enter only the show power syntax or you can specify a specific slot number. For more information, refer to the examples below.
A Slot Number is Specified
If you specify a slot number after the command syntax, power supply information for only the correspond­ing switch displays. For example:
Power Supplies in chassis 2 PS Operational Status
---------+------------------­PS-1 48V UP PS-2 48V NOT PRESENT
In the example above, power supply status for the switch operating in slot 2 displays. No backup power supply is installed—or the backup power supply is powered off.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 2-53
Viewing Primary and Backup Power Supply Status OmniSwitch 6800 Series Chassis and Hardware Components
No Slot Number is Specified
If you do not enter a slot number, power supply information for all switches in the stack displays. For example:
-> show power
Power Supplies in chassis 1 PS Operational Status
---------+------------------­PS-1 48V UP PS-2 48V UP
Power Supplies in chassis 2 PS Operational Status
---------+------------------­PS-1 48V UP PS-2 48V NOT PRESENT
Power Supplies in chassis 3 PS Operational Status
---------+------------------­PS-1 48V UP PS-2 48V UP
The example above shows the power supply status for a stack consisting of three switches. A backup power supply is present and running in switches operating in slots 1 and 3; no backup power supply is installed in the switch operating in slot 2—or the unit is powered off.
More Information on Stacked Configurations. For detailed information on stacked OmniSwitch 6800 Series switches, refer to “Managing OmniSwitch 6800 Series Stacks” on page 3-1.
page 2-54 OmniSwitch 6800 Series Hardware Users Guide June 2007
3 Managing OmniSwitch
6800 Series Stacks
In addition to working as individual stand-alone switches, OmniSwitch 6800 Series switches can also be linked together to work as a single virtual chassis known as a stack. With stacks, users can easily expand their switching capacity simply by adding additional switches to the stack. In addition, stacks provide enhanced resiliency and redundancy features. For more information, refer to page 3-2.
Note. See Chapter 2, “OmniSwitch 6800 Series Chassis and Hardware Components,” for information on managing OmniSwitch 6800 Series switches in a stand-alone configuration.

In This Chapter

The chapter provides information on OmniSwitch 6800 Series switches configured to operate as a single virtual chassis. Topics described in this chapter include:
OmniSwitch 6800 Series stack overview on page 3-2.
Roles within the stack on page 3-2.
Stack cabling on page 3-15.
Slot numbering on page 3-18.
Hot-Swapping modules in a stack on page 3-22.
Understanding tokens on page 3-24.
Reloading switches on page 3-25.
Changing the secondary module to primary on page 3-33.
Synchronizing switches in a stack on page 3-35.
Monitoring the stack on page 3-36.
Note. You can also manage and monitor OmniSwitch 6800 Series stacks with WebView, Alcatel-Lucent’s embedded web-based device management application. WebView is an interactive and easy-to-use GUI that can be launched from OmniVista or a web browser. Please refer to WebView’s online documentation for more information.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 3-1
OmniSwitch 6800 Series Stack Overview Managing OmniSwitch 6800 Series Stacks

OmniSwitch 6800 Series Stack Overview

Users can configure up to eight OmniSwitch 6800 Series switches—in any combination of OS6800-24 and OS6800-48 chassis types—into a single virtual chassis known as a stack. With stacks, switching capacity can be easily expanded simply by adding additional switches to the stack. For example, a user can start with a stack composed of two switches and add up to six additional switches to that stack as network demands increase over time.
Stacks also provide enhanced resiliency and redundancy features. If a switch in a stack goes down or is taken offline, the other elements in the stack will continue to operate without disruption. In addition, when a switch auto-synchronizes at boot-up—or if the user manually synchronize the switches (see “Synchro-
nizing Switches in a Stack” on page 3-35 for more information)—operating software and configuration
parameters are backed up on all switches in the stack. As a result, the original operating software and configuration parameters can be easily recovered if corrupted or otherwise lost.
Note on Terminology. In the user guides provided with your OmniSwitch 6800 Series switch, the terms stack and virtual chassis are interchangeable terms referring to OmniSwitch 6800 Series switches in a stacked configuration. The terms module, switch, slot and element are used to refer to individual switches within a stacked configuration. The terms Chassis Management Module (CMM) and management module refer to those switches operating in a stack either in primary or secondary management roles. OmniSwitch 6800 Series switches operating in an idle role are essentially acting as network interface modules and therefore may be referred to as Network Interfaces (NIs).

Roles Within the Stack

In order to operate as a virtual chassis, switches within an OmniSwitch 6800 Series stack are assigned specific roles. These roles include primary and secondary management roles, idle status, and pass-through. For detailed descriptions of each of these roles, including their practical functions within the virtual chas­sis, refer to the sections below.

Primary and Secondary Management Modules

When OmniSwitch 6800 Series switches operate in a stack, one switch in the stack always assumes the primary management role. This primary element is responsible for functions such as software and configu­ration management, web-based management (i.e., WebView), SNMP management, switch diagnostics, and software rollback.
One additional switch in the stack operates in a secondary management role. This switch serves as a backup, and is always ready to assume the primary management role in the stack if the switch with the primary role fails or is taken offline for any reason.
Because the secondary module quickly and automatically assumes management responsibilities, switches operating in idle mode elsewhere in the stack continue to pass traffic without disruption. This redundancy provides effective safeguards for mission-critical network traffic and is one of the stack’s most important failover features. Diagrams showing the management module failover sequence for stacks of three or more switches and stacks of two switches are provided on pages 3-3 and 3-4, respectively.
page 3-2 OmniSwitch 6800 Series Hardware Users Guide June 2007
Managing OmniSwitch 6800 Series Stacks Roles Within the Stack
Important Note. For management module redundancy to work effectively, the software on all switches operating in the stack must be synchronized at all times. Refer to “Synchronizing Switches in a Stack” on
page 3-35 for more information.
Primary
Secondary
Idle
Idle
Offline
Secondary
Idle
Idle
Offline
Primary
Secondary
Idle
Idle
Primary
Secondary
A stack of four OmniSwitch 6800 Series switches is
1
operating normally. The stack consists of a primary module, secondary module, and two elements operating in idle status. (The software on all elements in the stack is synchronized.)
!
The primary management module in the stack fails or is
2
taken offline (e.g., powered off or rebooted by the user).
The switch operating as the secondary management module
3
immediately takes over the primary role. Meanwhile, the adjacent switch—previously operating in idle status—now assumes the secondary management role.
4
If the switch that failed or was taken offline comes back online, it will assume an idle role in the stack. In other words, it will act essentially as an NI module in the virtual chassis, passing traffic via its Ethernet ports.
Idle
Redundant Management Module Failover (Three or More Switches)
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 3-3
Roles Within the Stack Managing OmniSwitch 6800 Series Stacks
A stack of two OmniSwitch 6800 Series switches is
1
Primary
Secondary
Offline
Secondary
Offline
Primary
!
operating normally. The stack consists of a primary module and a secondary module. (The software on both elements in the stack is synchronized.)
The primary management module fails or is taken
2
offline (e.g., powered off or rebooted by the user).
The switch operating as the secondary management module
3
immediately takes over the primary role. It is at this point essentially operating as a stand-alone switch.
Secondary
Primary
4
If the switch that previously failed or was taken offline comes back online, it will assume the secondary role in the stack.
Redundant Management Module Failover (Two Switches)
page 3-4 OmniSwitch 6800 Series Hardware Users Guide June 2007
Managing OmniSwitch 6800 Series Stacks Roles Within the Stack
Primary Management Module Selection
In order for a stack of OmniSwitch 6800 Series switches to operate as a virtual chassis, there must be mechanism for dynamically selecting which switch within the stack will assume the primary management role. OmniSwitch 6800 Series switches use three different methods for selecting the primary switch. These methods are:
Chassis MAC address
Saved slot number
Chassis uptime
Note. Information on secondary management module selection is provided on page 3-8. Information on dynamic assignment of idle module roles is provided on page 3-10.
Using the Chassis MAC Address
By default, the primary management role will be given to the switch with the lowest chassis MAC address. However, for this to occur, all switches in the stack must be booted within 15 seconds of each other. In addition, switches in the stack must have no preconfigured slot information. Because of these two conditions, the MAC address method for selecting the primary module usually occurs with new “out of the box” switches, or switches from which any preconfigured slot information has been cleared.
For more information on using the lowest MAC address to determine the primary switch in a stack, refer to the diagram below:
1
A stack of four OmniSwitch 6800 Series switches is booted. All switches are powered on within 15 seconds of each other. In addition, there is no preconfigured slot information on any of the switches.
00:d0:95:b2:3c:8e
2
00:d0:95:b2:2a:ab
00:d0:95:b2:1c:ff
00:d0:95:b2:5b:8d
00:d0:95:b2:3c:8e
00:d0:95:b2:2a:ab
Primary Module
00:d0:95:b2:5b:8d
When the stack is booted, system software detects the lowest MAC address. In this stacked configuration, the lowest MAC address is 00:d0:95:b2:1c:ff.
3
The system software immediately assigns the correspond­ing switch the primary management role. When the switch is assigned as primary, it is also dynamically assigned the lowest slot number in the stack—i.e., slot 1. This slot number information is saved to the located in the switch’s /flash file directory.
boot.slot.cfg
file,
Primary Management Module Selection Using the Lowest Chassis MAC Address
Note. During the boot process, all other switches in the stack are also dynamically assigned unique slot
numbers. As with the primary switch, these slot numbers are saved to the boot.slot.cfg file, located in the /flash file directory of each switch. For more information on dynamic slot number assignment, refer to
“Slot Numbering” on page 3-18.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 3-5
Roles Within the Stack Managing OmniSwitch 6800 Series Stacks
Using Saved Slot Information
The saved slot number is the slot number the switch will assume following a reboot. This information is stored in a switch’s boot.slot.cfg file; the switch reads its slot number assignment from this file at bootup and assumes the specified slot number within the stack.
If switches in a stacked configuration have no preconfigured slot assignments, the slot number for each switch is dynamically assigned by the system software. Slot numbers can also be manually assigned by the user. For more information on manually assigning slot numbers, refer to “Manual Slot Number Assign-
ment” on page 3-20.
When a stack with preconfigured slot information is booted, it is not the lowest MAC address that deter­mines the primary management module. Instead, the slot information stored in each switch’s boot.slot.cfg is read by the system software and used in determining the primary. The switch with the lowest saved slot number becomes the primary management module.
Note. Although, for ease-of-management purposes, it is recommended that slot numbers are assigned beginning with slot number 1, it is not a requirement. In other words, a stack of four switches can have slot assignments 3, 4, 5, and 6. However, it is important that each element in a stack is assigned a unique slot number. Do not assign duplicate slot numbers to elements in a stack. Otherwise, one or more switches will be forced into pass-through mode. For more information on pass-through mode, refer to page 3-11.
For more information on using saved slot information to determine the primary switch in a stack, refer to the diagram below:
Saved Slot 6
Saved Slot 5
Saved Slot 4
Saved Slot 3
Four OmniSwitch 6800 Series switches are stacked; all switches
1
are connected via stacking cables. The user configures each switch to have a unique saved slot number. When each saved slot number is configured, the information is automatically written to the each switch.
boot.slot.cfg
file located in the /flash directory of
Reload
The user reloads all the elements in the stack either by
2
Assumes Slot 6
Assumes Slot 5
Assumes Slot 4
Assumes Slot 3
Slot 6
Slot 5
Slot 4
Primary: Slot 3
issuing the off and then powering on all switches.
Instead of assigning the primary management module
3
based on the lowest MAC address, the system software reads the slot information from each switch’s
boot.slot.cfg
in the stack come up using their assigned slot numbers.
4
The switch with the lowest assigned slot number automatically assumes the primary management role. In this case, the switch assigned slot 3 has the lowest slot number in the stack and becomes the primary management module.
reload all
file during the boot process. The switches
command or by physically powering
Primary Management Module Selection Using Saved Slot Information
page 3-6 OmniSwitch 6800 Series Hardware Users Guide June 2007
Managing OmniSwitch 6800 Series Stacks Roles Within the Stack
Using Switch Uptime
A user can override both the MAC address and saved slot methods for determining a stack’s primary management module. This is done by controlling the uptime of switches in the stack. If all elements of a stack are powered off, the user can force a particular switch to become primary by powering on that switch and waiting a minimum of 15 seconds before powering on any other switches. This can be useful if the user wants a switch placed in a specific location—e.g., the top-most switch in a stack—to become the primary.
As with the lowest MAC address method, the primary management module is dynamically assigned slot number 1 when the stack is booted.
For more information on using saved slot information to determine the primary switch in a stack, refer to the diagram below:
Off
Off
Off
Powered On
Off
Off
Off
Primary
(Saved Slot 8)
Powered On
Powered On
Powered On
Primary
(Saved Slot 8)
Saved Slot 3
Saved Slot 1
Saved Slot 2
Primary
(Saved Slot 8)
Four OmniSwitch 6800 Series switches are stacked and connected via
1
stacking cables. All switches are currently powered off. The user powers on a single switch in the stack. In this case, the bottom-most switch is powered on.
The user allows a minimum of 15 seconds to pass. Because no
2
other switches have joined the stack, the switch that was powered on considers itself a stand-alone. The switch assumes a primary role by default—even if there is a high saved slot number in its
boot.slot.cfg
The user now powers on the remaining switches in the stack in short
3
succession.
In this example, when the remaining switches come online, each has a
4
lower saved slot value than the switch powered on at step 1. However, the switch powered on at step 1—with its slot value of 8—retains its primary management role. The joining switches are essentially ineligible for primary status because they are considered “late arrivals.”
For the primary switch to forfeit its role to the switch with the lowest assigned slot number (in this case, slot number 1), the stack must be rebooted by the user either by issuing the powering off and powering on all switches in close succession.
file (e.g., 8).
reload all
command or by
Primary Management Module Selection Using Switch Uptime
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 3-7
Roles Within the Stack Managing OmniSwitch 6800 Series Stacks
Secondary Management Module Selection
In order to provide effective management module redundancy, all OmniSwitch 6800 Series stacked configurations dynamically assign a backup—or secondary—management module during the boot process. OmniSwitch 6800 Series stacks use two different methods for selecting the secondary switch. These methods are:
Stacking connection to the primary switch
Saved slot number
Using the Stacking Connection to the Primary Switch
By default, the switch that is connected to the primary switch’s stacking port A is automatically assigned the secondary management role. This applies to stacks on which there is no preassigned slot information— i.e., there is no boot.slot.cfg file present in any switch.
For more information on using the stacking connection to the primary switch to determine the secondary management module, refer to the diagram below:
A B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
1
Four OmniSwitch 6800 Series switches are stacked and connected via stacking cables, as shown. All switches are currently powered off. None of the switches have preassigned slot numbers—i.e., there are no
boot.slot.cfg
present. The user powers on all switches in the stack in close succession and the stack begins the boot process.
files
A B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
00:d0:95:b2:3c:8e
00:d0:95:b2:2a:ab
00:d0:95:b2:1c:ff
(Primary - Slot 1)
00:d0:95:b2:5b:8d
When the elements in the stack come online,
2
the switch with the lowest MAC address is given the primary management role and is dynamically assigned slot number 1.
A B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Idle
Idle
Primary
Secondary - Slot 2
By default, the switch connected to the
3
primary’s stacking port A is automatically assigned the secondary management role. The secondary switch is dynamically assigned slot number 2.
Secondary Management Module Selection Using the Stacking Connection to the Primary Switch
Note. For information on dynamic slot numbering for idle elements within the stack, refer to “Idle Module
Role” on page 3-10 and “Slot Numbering” on page 3-18.
page 3-8 OmniSwitch 6800 Series Hardware Users Guide June 2007
Managing OmniSwitch 6800 Series Stacks Roles Within the Stack
Using Saved Slot Information
If a stack with preassigned slot information for each switch is booted, the switch with the second-lowest slot value is assigned the secondary management role. For example, if a stack of four switches is booted and the preassigned slot values for each switch are 1, 2, 3, and 4, the switch with the slot value of 2 is assigned the secondary role. Meanwhile, the switch with the slot value of 1 is assigned the primary management role (see page 3-6).
For more information on using saved slot information to determine the secondary management module in a stack, refer to the diagram below:
Saved Slot 1
Saved Slot 3
Saved Slot 4
Saved Slot 2
Reload
Assumes Slot 1
Assumes Slot 3
Assumes Slot 4
Assumes Slot 2
Primary - Slot 1
Slot 3
Slot 4
Secondary - Slot 2
Four OmniSwitch 6800 Series switches are stacked; all switches
1
are connected via stacking cables. The user configures each switch to have a unique saved slot number, as shown. When the saved slot number is configured, the information is automatically written to the each switch.
The user reloads all the elements in the stack either by issuing
2
the
reload all
powering on all switches.
The system software reads the slot information from each
3
switch’s in the stack come up using their assigned slot numbers.
4
The switch with the lowest assigned slot number automatically assumes the primary management role. The switch with the
second-lowest
management role, regardless of whether it is attached to stacking port A of the primary switch. In this case, the switch assigned slot 2 has the second-lowest slot number in the stack and becomes the secondary management module.
boot.slot.cfg
command or by physically powering off and then
boot.slot.cfg
assigned slot number becomes the secondary
file located in the /flash directory of
file during the boot process. The switches
Secondary Management Module Selection Using Saved Slot Information
Reminder. Each element in a stack should always be assigned a unique slot number. Do not assign
duplicate slot numbers to elements in a stack. Otherwise, one or more switches will be forced into pass-through mode. For more information on pass-through mode, refer to page 3-11.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 3-9
Roles Within the Stack Managing OmniSwitch 6800 Series Stacks

Idle Module Role

Switches that are not assigned either the primary or secondary role in a stack are, by default, assigned the role of idle modules. These idle modules operate similarly to Network Interface (NI) modules in a chassis­based switch, such as the OmniSwitch 9700/9800. It is the job of idle modules to send and receive 10/100/1000 Ethernet traffic on their ports.
In the event of a management module failure within the stack, the idle module with the next-lowest slot number in the stack will automatically assume the secondary management role. In other words, if the primary module in a stack goes down for any reason and the secondary takes over the primary manage­ment role, the switch must now assign a new secondary module. The idle element with the next-lowest slot number assumes this new responsibility until the situation is corrected and all elements in the stack are reloaded.
Note. Primary and secondary management modules also send and receive 10/100/1000 traffic on their Ethernet ports. The primary management module is like an NI module with the added task of overall stack management; the secondary management module is like an NI with the added responsibility of backing up the primary module in the event of a primary module failure. In other words, all modules in the virtual chassis can send and receive user data, regardless of their roles.
For more information on dynamic assignment of idle modules in a stack, refer to the diagram below:
1
Four OmniSwitch 6800 Series switches are stacked; all switches are connected via stacking cables. The stack is booted.
2
The primary and secondary management modules are dynamically
3-5
Primary
Secondary
Idle
Idle
Primary
Secondary
assigned using any of the methods outlined on pages
3
The system software automatically assigns the remaining elements in the stack the idle module role. These modules act as Network Interface (NI) modules, sending and receiving 10/100/1000 Ethernet traffic on their ports.
In the event of a primary-to-secondary failover, the idle module with the next-lowest slot number in the stack will assume the secondary—or backup—management role.
through
3-9
.
Secondary Management Module Selection Using Saved Slot Information
page 3-10 OmniSwitch 6800 Series Hardware Users Guide June 2007
Managing OmniSwitch 6800 Series Stacks Roles Within the Stack

Pass-Through Mode

Pass-through mode is a state in which a switch has attempted to join a stack but has been denied primary, secondary, and idle status. When a switch is in pass-through mode, its Ethernet ports are brought down (i.e, they cannot pass traffic). Its stacking cable connections remain fully functional and can pass traffic through to other switches in the stack. In this way, pass-through mode provides a mechanism to prevent the stack ring from being broken. However, note that when a switch comes up in pass-through mode, it should not be left unresolved. Pass-through mode is essentially an error state that should be corrected immediately by the user.
Note. When a switch is in pass-through mode, its information will not display in hardware monitoring commands such as show chassis, show ni, show module, etc.
Conditions that can trigger a switch to enter pass-through mode include:
Duplicate slot numbers have been assigned within the stack
There are not adequate tokens available for the switch to join the stack (see page 3-24)
The user has manually forced the switch into pass-through mode using the stack clear slot command
Note. If a switch is forced into pass-through mode, the rest of the stack will not be disrupted. Any elements in the stack not operating in pass-through mode continue to operate normally.
The most common reason for one or more switches to enter pass-through is duplicate slot number assign­ments within the stack. So, in order to avoid pass-through mode, it is useful to keep track of the current saved slot numbers on all elements in the stack. Slot number assignments are stored in the boot.slot.cfg file in the /flash directory of each switch.
If the stack is booted and the same slot number is discovered on two or more switches, the switch with the lowest MAC address is allowed to come up and operate normally. Meanwhile, switches with the duplicate slot number and a higher MAC address come up in pass-through mode. To check the current slot number stored in each switch’s boot.slot.cfg file, use the show stack topology command. For example:
-> show stack topology Link A Link A Link B Link B NI Role State Saved Link A Remote Remote Link B Remote Remote Slot State NI Port State NI Port
----+-----------+--------+------+-------+-------+-------+-------+-------+------­ 1 PRIMARY RUNNING 1 UP 3 StackA UP 2 StackA 2 SECONDARY RUNNING 2 UP 1 StackB UP 3 StackB 3 IDLE RUNNING 2 UP 1 StackA UP 2 StackB
In this example, note that both slots 2 and 3 have a saved slot value of 2. If this stack is rebooted, a dupli­cate slot error will occur and the switch with the lower MAC address will be given the secondary manage­ment role. The slot with the higher MAC address will be forced into pass-through mode.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 3-11
Roles Within the Stack Managing OmniSwitch 6800 Series Stacks
To avoid a pass-through condition following a reboot, make sure that all saved slot values for the stack are unique. Use the stack set slot command. For example, change the saved slot value for the idle switch in slot 3 from 2 to 3:
-> stack set slot 3 saved-slot 2
Use the show stack topology command to verify the change:
-> show stack topology Link A Link A Link B Link B NI Role State Saved Link A Remote Remote Link B Remote Remote Slot State NI Port State NI Port
----+-----------+--------+------+-------+-------+-------+-------+-------+------­ 1 PRIMARY RUNNING 1 UP 3 StackA UP 2 StackA 2 SECONDARY RUNNING 2 UP 1 StackB UP 3 StackB 3 IDLE RUNNING 3 UP 1 StackA UP 2 StackB
Recovering from Pass-Through Mode (Duplicate Slot Numbers)
The first step in recovering from pass-through is to determine which modules are currently operating in pass-through, as well as the reason for the pass-through state. To view this information, use the show stack topology command. For example:
-> show stack topology Link A Link A Link B Link B NI Role State Saved Link A Remote Remote Link B Remote Remote Slot State NI Port State NI Port
----+-----------+--------+------+-------+-------+-------+-------+-------+------­ 1 PRIMARY RUNNING 1 UP 1001 StackA UP 2 StackA 2 SECONDARY RUNNING 2 UP 1 StackB UP 1001 StackB 1001 PASS-THRU DUP-SLOT 2 UP 1 StackA UP 2 StackB
Switches operating in pass-through mode are given distinct slot numbers. These slot numbers are not related to their position in the stack. Instead, they are assigned the prefix “100,” followed by the numeri­cal order in which they were forced into pass-through (1001–1008).
Note. For pass-through elements 1001 through 1008, the slot indicator LED on the chassis front panel blinks 1 through 8, respectively. For example, if a module enters pass-through and has the slot number 1004, the LED for the module blinks the number 4. For more information on the slot indicator LED, refer to “Status LEDs” on page 2-13.
In the example above, the switch with the NI (i.e., slot) number 1001 is operating in pass-through. Note that the role assignment is PASS-THRU; also, the state displays DUP-SLOT, or duplicate slot number. This can be further verified by looking down the saved slot column in the table. Note that slot 2, operating in the secondary management role, has a saved slot value of 2. Slot 1001, operating in pass-through, also has a saved slot value of 2.
page 3-12 OmniSwitch 6800 Series Hardware Users Guide June 2007
Managing OmniSwitch 6800 Series Stacks Roles Within the Stack
To resolve this pass-through condition, simply assign slot 1001 a new saved slot value and reboot the module. This can be done in either of two ways:
Use the stack set slot command to assign the new value, then use the reload pass-through command
to reboot the module:
-> stack set slot 1001 saved-slot 3
-> reload pass-through 1001
Use the stack set slot command to assign the new slot value and, using the optional reload syntax in
the command line, reboot the module:
-> stack set slot 1001 saved-slot 3 reload
When the module comes up, it assumes the new, unique slot position—in this case, slot 3—and, because it now has the highest slot number in the stack, it assumes an idle role (leaving the primary and secondary roles to slots 1 and 2, respectively). There are now no duplicate numbers in the stack and all elements are operating normally:
-> show stack topology Link A Link A Link B Link B NI Role State Saved Link A Remote Remote Link B Remote Remote Slot State NI Port State NI Port
----+-----------+--------+------+-------+-------+-------+-------+-------+------­ 1 PRIMARY RUNNING 1 UP 3 StackA UP 2 StackA 2 SECONDARY RUNNING 2 UP 1 StackB UP 3 StackB 3 IDLE RUNNING 3 UP 1 StackA UP 2 StackB
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 3-13
Roles Within the Stack Managing OmniSwitch 6800 Series Stacks
In some pass-through conditions (for example, larger stacks where multiple switches are in pass-through mode), it might be desirable to correct any duplicate saved slot assignments and then reboot the entire stack. The recovery from pass-through can be accomplished with fewer steps than reassigning slot numbers and rebooting modules on a slot-by-slot basis. However, be sure that there is no mission-critical traffic being passed on the non-pass-though modules; traffic will be interrupted on these modules during the reboot.
The following example shows a large stack with multiple elements operating in pass-through mode:
-> show stack topology Link A Link A Link B Link B NI Role State Saved Link A Remote Remote Link B Remote Remote Slot State NI Port State NI Port
----+-----------+--------+------+-------+-------+-------+-------+-------+------­ 4 IDLE RUNNING 4 UP 5 StackB UP 3 StackA 5 IDLE RUNNING 5 UP 1001 StackB UP 4 StackA 1001 PASS-THRU DUP-SLOT 2 UP 2 StackB UP 5 StackA 2 SECONDARY RUNNING 2 UP 1003 StackB UP 1001 StackA 1003 PASS-THRU DUP-SLOT 2 UP 1002 StackB UP 2 StackA 1002 PASS-THRU DUP-SLOT 2 UP 1 StackB UP 1003 StackA 1 PRIMARY RUNNING 1 UP 3 StackB UP 1002 StackA 3 IDLE RUNNING 3 UP 4 StackB UP 1 StackA
This disordered stack topology, with its three modules operating in pass-through mode, can be corrected by entering the following commands:
-> stack set slot 4 saved-slot 1
-> stack set slot 5 saved-slot 2
-> stack set slot 1001 saved-slot 3
-> stack set slot 2 saved-slot 4
-> stack set slot 1003 saved-slot 5
-> stack set slot 1002 saved-slot 6
-> stack set slot 1 saved-slot 7
-> stack set slot 3 saved-slot 8
-> reload all
When all elements in the stack come up following the reboot, there are no longer any duplicate slot numbers in the stack. In addition, the stack topology is more orderly and, as a result, easier to manage:
-> show stack topology Link A Link A Link B Link B NI Role State Saved Link A Remote Remote Link B Remote Remote Slot State NI Port State NI Port
----+-----------+--------+------+-------+-------+-------+-------+-------+------­ 1 PRIMARY RUNNING 1 UP 2 StackB UP 8 StackA 2 SECONDARY RUNNING 2 UP 3 StackB UP 1 StackA 3 IDLE RUNNING 3 UP 4 StackB UP 2 StackA 4 IDLE RUNNING 4 UP 5 StackB UP 3 StackA 5 IDLE RUNNING 5 UP 6 StackB UP 4 StackA 6 IDLE RUNNING 6 UP 7 StackB UP 5 StackA 7 IDLE RUNNING 7 UP 8 StackB UP 6 StackA 8 IDLE RUNNING 8 UP 1 StackB UP 7 StackA
page 3-14 OmniSwitch 6800 Series Hardware Users Guide June 2007
Managing OmniSwitch 6800 Series Stacks Stack Cabling

Stack Cabling

Switches are connected to each other in a stack with stacking cables. These stacking cables provide high­speed, dual-redundant links between switches in a stack.
Stacking cables for OmniSwitch 6800 Series switches can be connected in any pattern. In other words, the cable connected to stacking port A of one switch can be connected to either stacking port A or stacking port B of the adjacent switch. However, it is strongly recommended that the cabling pattern remains consistent across the stack. In addition, for a stack to have effective redundancy, a redundant stacking cable must be installed between the upper-most and bottom-most switch at all times. This provides effec­tive failover in the event of a stacking link or module failure within the stack.
The diagram below shows two recommended stacking cable patterns. For detailed information on assem­bling a stack and connecting the cables, refer to Chapter 2, “OmniSwitch 6800 Series Chassis and Hard-
ware Components.”
Note. When planning the stack cabling configuration, keep in mind that the switch connected to stacking port A of the primary switch will be assigned the secondary management role by default.
A B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
A B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
Stack A Stack B
A stack of eight switches in a crossed (stacking port A to stacking port B) configuration. Note that a redundant stacking cable connection exists between the top and bottom switches. This connection is required for effective redundancy across the stack.
A stack of eight switches in a straight (stacking port A to stacking port A; stacking port B to stacking port B) configuration. Note that a redundant stacking cable connection exists between the top and bottom switches. Again, this connection is required for effective redundancy across the stack.
Stack A Stack B
Examples of Stacking Cable Patterns (Chassis Rear Panels Shown)
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 3-15
Stack Cabling Managing OmniSwitch 6800 Series Stacks

Redundant Stacking Cable Connection

OmniSwitch 6800 Series switches allow redundant stacking cable connections between the top-most and bottom-most switches in a stack.
Important. For a stacked configuration to have effective redundancy, a redundant stacking cable must be installed between the upper-most and bottom-most switch in the chassis at all times.
The figure below shows how the redundant connection between the top and bottom switches in the stack ensures that data will continue to flow throughout the stack, even in the event of a connection failure at one of the stacking cables.
Chassis FrontStacking Cables
Slot 1
Slot 2
Slot 3
Slot 4
Slot 1
Slot 2
Slot 3
Slot 4
Data enters slot 1 via a 10/100/1000 Ethernet port. The
1
data is passed to slot 2 over the stacking cable connection, then exits slot 2 via one of its 10/100/1000 Ethernet ports.
The stacking connection between slots 1 and 2 goes
2
down unexpectedly. Data can no longer travel directly between slot 1 and 2.
However, because there is a redundant connection (the cable between slot 1 and slot 4), data is immediately passed to slot 4, then quickly traverses slot 3 and exits slot 2 to its destination.
Stacking Cable Redundancy: Recovery Following a Stacking Link Failure
page 3-16 OmniSwitch 6800 Series Hardware Users Guide June 2007
Managing OmniSwitch 6800 Series Stacks Stack Cabling
Redundant stacking cables provide a form of dual redundancy. As shown in the figure above, the redun­dant cable allows traffic to flow in the event of a stacking link failure. The redundant cable also provides failover if a switch goes down within the stack. Traffic continues to flow between the modules that remain operational, as shown in the diagram below:
Chassis FrontStacking Cables
Data enters slot 1 through a 10/100/1000 Ethernet port.
Slot 1
Slot 2
Slot 3
Slot 4
1
The data traverses slot 2 via the stacking cables and exits slot 3 through one of its 10/100/1000 Ethernet ports.
Slot 1
Slot 2
Slot 3
Slot 4
The slot 2 switch goes down unexpectedly. Data can no
2
longer move through slot 2.
However, because there is a redundant connection (the cable between slot 1 and slot 4), data immediately traverses slot 4 and then exits slot 3 to its destination.
Stacking Cable Redundancy: Recovery Following a Switch Failure within the Stack

Checking Redundant Stacking Cable Status

To check whether a redundant stacking cable connection exists between the top-most and bottom-most switches in the stack, use the show stack status command. For example:
-> show stack status Redundant cable status : present Tokens used : 12 Tokens available : 20
In this example, a redundant stacking cable connection is present between the top-most and bottom-most switches in the stack.
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 3-17
Slot Numbering Managing OmniSwitch 6800 Series Stacks

Slot Numbering

For a stack of OmniSwitch 6800 Series switches to operate as a virtual chassis, each module in the stack must be assigned a unique slot number. To view the current slot assignments for a stack, use the show ni or show module commands. The slot number is also displayed on the front panel of each switch by the LED located on the right side of the chassis (refer to “Status LEDs” on page 2-13 for more information).
There are two ways stacking modules are assigned slot numbers:
Dynamic slot number assignment by the system software
Manual slot number assignment by the user

Dynamic Slot Number Assignment

Dynamic slot number assignment occurs when there are no boot.slot.cfg files present in the switches’ /flash directories. This is the case for new, “out of the box,” switches that have not been previously booted.
When a brand new stack (or stack with no boot.slot.cfg files) is booted, the system software automatically detects the module with the lowest MAC address. This module is assigned the primary management role (see page 3-2) and, by default, is given the slot number 1. The module connected to the primary’s stacking port A is automatically assigned the secondary management role and given the slot number 2.
As the other modules in the stack become operational, they are assigned idle roles and are automatically assigned unique slot numbers (3–8, depending on the number of switches in the stack). The slot number­ing for idle modules is determined by each module’s physical location in the stack. Refer to the diagrams below for more information on dynamic slot numbering.
Note. As the slot numbers are dynamically assigned, boot.slot.cfg files are auto-generated in the /flash directory of each switch. When modules are subsequently booted, each switch reads its slot number assignment from this file and comes up accordingly.
In this example, the fourth switch from the top is elected the primary management module for the stack. (It can be assumed that this switch has the lowest MAC address in the stack.) This switch is
Slot 6 - Idle
Slot 7 - Idle
Slot 8 - Idle
Slot 1 - Primary
Slot 2 - Secondary
Slot 3 - Idle
Slot 4 - Idle
Slot 5 - Idle
automatically assigned slot number 1.
The switch immediately below is connected to the primary switch’s stacking port A and, as a result, is assigned the secondary management role and given slot number 2.
The system software allows the switch immediately below slot 2 to have the next slot number preference. It is assigned an idle role and given the slot number 3. The switch immediately below slot 3 is given the slot number 4, and so on. When the bottom of the stack is reached, the slot numbering sequence resumes at the top of the stack, as shown. This helps ensure a more ordered and manageable stack topology.
Dynamic Slot Numbering Example 1
page 3-18 OmniSwitch 6800 Series Hardware Users Guide June 2007
Managing OmniSwitch 6800 Series Stacks Slot Numbering
If the switch with the lowest MAC address happens to be the bottom-most module in the stack, slot numbering will not resume from the top of the stack. Instead, the system software will select the second­ary module using the standard method (i.e., the switch connected to the primary’s stacking port A), then continue to number the stack from the bottom up. This intuitive slot assignment provides the cleanest and most manageable stack topology. Refer to the diagram below for more information.
In this example, the bottom switch is elected the primary management module for the stack. (It can be assumed that this switch has the low­est MAC address in the stack.) This switch is
Slot 8 - Idle
Slot 7 - Idle
Slot 6 - Idle
Slot 5 - Idle
automatically assigned slot number 1.
The switch immediately above is connected to the primary switch’s stacking port A and, as a result, is assigned the secondary management role and given slot number 2.
Slot 4 - Idle
Slot 3 - Idle
Slot 2 - Secondary
Slot 1 - Primary
The system software then sequentially assigns slot numbers up the stack. In other words, the switch immediately above slot 2 is assigned the slot number 3; the switch immediately above slot 3 is assigned the slot number 4, and so on. This default procedure ensures the most ordered and manageable stack topology out of the box.
Dynamic Slot Numbering Example 2
OmniSwitch 6800 Series Hardware Users Guide June 2007 page 3-19
Slot Numbering Managing OmniSwitch 6800 Series Stacks

Manual Slot Number Assignment

To manually assign slot numbers to one or more modules in a stack, use the stack set slot command. This command writes slot information to the boot.slot.cfg file located in a switch’s /flash directory. It is this saved slot information that the switch will assume following a reboot.
Manually assigning slot numbers can be useful in reordering existing slot numbers in order to create a sequential numbering scheme from the top of the stack to the bottom (or vice-versa). Refer to the follow­ing example:
Slot 6 - Idle
Slot 7 - Idle
Slot 8 - Idle
Slot 1 - Primary
Slot 2 - Secondary
Slot 3 - Idle
Slot 4 - Idle
Slot 5 - Idle
This example, taken from page 3-18, shows a stack in which the primary and secondary switches are phys­ically positioned in the middle of the stack. Although the stack will operate normally with this primary and secondary module positioning, it may be preferable for management purposes to have the primary and secondary switches at either the top or the bottom of the stack. For this example, the primary and second­ary roles will be assigned to the top of the stack. This is accomplished by entering the following commands:
-> stack set slot 6 saved-slot 1
-> stack set slot 7 saved-slot 2
-> stack set slot 8 saved-slot 3
-> stack set slot 1 saved-slot 4
-> stack set slot 2 saved-slot 5
-> stack set slot 3 saved-slot 6
-> stack set slot 4 saved-slot 7
-> stack set slot 5 saved-slot 8
-> reload all
Because slot 6 is the top-most switch in the stack, it is reassigned the slot 1 (i.e., primary) position; because slot 7 is located immediately below slot 6, it is reassigned the slot 2 (i.e., secondary) position, etc.
Note that the modules were not reloaded one-by-one, even though the stack set slot command provides optional syntax for doing so. Instead, new slot number information is first saved to each boot.slot.cfg file across the stack. The reboot is saved for last in order to avoid duplicate slot numbers within the stack, which would cause unwanted pass-though mode conditions (see page 3-11).
page 3-20 OmniSwitch 6800 Series Hardware Users Guide June 2007
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