3Com 3CB9LG9MC, 3CB9LF36T, 3CB9LF36R, 3CB9LF36RL, 3CB9LF36TL User Manual

...
®
CoreBuilder
9000
Release Notes
Fast Ethernet and Gigabit Ethernet Layer 2 Switching Modules, Release 3.0
20-port 10/100BASE-TX Fast Ethernet Layer 2 Switching Module
(3CB9LF20R)
36-port 10/100BASE-TX Fast Ethernet RJ-45 Layer 2 Switching
Module (3CB9LF36R)
36-port 10/100BASE-TX Fast Ethernet Telco Layer 2 Switching
Module (3CB9LF36T)
36-port 10/100BASE-TX Desktop Switching Module (RJ-45
Connectors) (3CB9LF36RL)
36-port 10/100BASE-TX Desktop Switching Module (RJ-21 Telco
Connectors) (3CB9LF36TL)
10-port 100BASE-FX Fast Ethernet Layer 2 Switching Module
(3CB9LF10MC)
20-port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching
Module (3CB9LF20MM)
9-Port 1000BASE-SX Gigabit
Ethernet Layer 2 Switching Module (
3CB9LG9MC)
http://www.3com.com/
Part No. 10013497 Published January 2000
3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145
Copyright © 2000, 3Com Corporation. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without written permission from 3Com Corporation.
3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change.
3Com Corporation provides this documentation without warranty, term, or condition of any kind, either implied or expressed, including, but not limited to, the implied warranties, terms, or conditions of merchantability, satisfactory quality, and fitness for a particular purpose. 3Com may make improvements or changes in the product(s) and/or the program(s) described in this documentation at any time.
If there is any software on removable media described in this documentation, it is furnished under a license agreement included with the product as a separate document, in the hard copy documentation, or on the removable media in a directory file named LICENSE.TXT or !LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be provided to you.
UNITED STATES GOVERNMENT LEGEND
If you are a United States government agency, then this documentation and the software described herein are provided to you subject to the following:
All technical data and computer software are commercial in nature and developed solely at private expense. Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) or as a “commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited rights only as provided in DFAR 252.227-7015 (Nov 1995) or FAR 52.227-14 (June 1987), whichever is applicable. You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in, or delivered to you in conjunction with, these Release Notes.
Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not be registered in other countries.
3Com, the 3Com logo, CoreBuilder, LANsentry, PACE, SuperStack, and Transcend are registered trademarks of 3Com Corporation. 3Com Facts is a service mark of 3Com Corporation.
Netscape is a registered trademark of Netscape Communications Corporation in the United States and other countries. Java is a registered trademark of Sun Microsystems, Inc. UNIX is a registered trademark in the United States and other countries, licensed exclusively through X/Open Company, Ltd.
All other company and product names may be trademarks of the respective companies with which they are associated.
ONTENTS
C
O
1
2
VERVIEW
Important Notices 7 Supported Modules 8 System Requirements 9
Boot Code and Operational Code 9 Optional Switch Fabric Module Redundancy 10 Optional Management Redundancy 10
R
ELEASE HIGHLIGHTS
Web-based Management 12 ISO Date and Time Format 13 New Modules 13 IGMP 14 10/100 Mbps Ethernet Port Monitoring 14 RMON Monitoring Applications 15
802.1p CoS 15 Loop Detection 15 Bridge Address Learning Limits 19 Secure Address Learning Mode 20 Configuring One Untagged System VLAN 22 Broadcast, Multicast, and Flood Rate Limiting 23
Module Packet-egress Rate Limiting 23 Port Multicast Packet-ingress Rate Limiting 25 How Port Rate Limits and Thresholds Work 26
R
3
ELEASE ISSUES
Corrected Problems 27
System 27 Management 27 Ethernet 27 Bridging 28 VLANs 29
System Issues 29
Staging 29 System 29 Management 30 Web-based Management 30 SNMP 30 Ethernet 30 Bridging 31 Resilient Links 32 IGMP 32 Trunking 32 VLANs 32
Known Problems 34
System 34 Management 34 Ethernet 37 Bridging 38 Trunking 38
Documentation Changes 40
Ethernet 40 Web-based Management 40
S
OFTWARE INSTALLATION
4
How to Obtain Software Image Files 41 Installation and Upgrade Prerequisites 41
Verifying and Updating Modules for an Existing Chassis 42 Verifying and Updating Modules for a New Chassis 43
Downloading Software 44
Downloading Release 3.0 Software 44 Update Emergency Download Parameters 46
Downgrading Switching Modules to Software Release 2.1.0 48
R
5
6
EFERENCE
Identifying Modules in the Switch 49 Applicable Documents 51 MIB Files 51
3Com Enterprise MIBs 52 Entering Commands 53 Understanding Autonegotiation 53 Year 2000 Compliance 54
T
ECHNICAL SUPPORT
Online Technical Services 55
World Wide Web Site 55
3Com Knowledgebase Web Services 55
3Com FTP Site 56
3Com Bulletin Board Service 56
Access by Analog Modem 56 Access by Digital Modem 57
3Com Facts Automated Fax Service 57 Support from Your Network Supplier 57 Support from 3Com 57 Returning Products for Repair 59
1
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Important Notices

These release notes summarize operational requirements and issues for CoreBuilder
Read these important notices before you begin.
For the most up-to-date release notes for the CoreBuilder 9000 management modules, switch fabric modules, Layer 3 interface modules, and other Layer 2 interface modules, visit the 3Com Web site:
http://support.3com.com/nav/switches.htm
CAUTION:
Enterprise Management Engine (EME) have 20 MB of CPU RAM. To determine the CPU RAM size, enter line interface. The indicates the amount of CPU RAM:
If your EME has 8 MB of CPU RAM, you must replace the 4 MB DRAM card in your EME with a 16 MB DRAM card. Contact your network supplier or 3Com representative for information about how to obtain a 16 MB DRAM memory card.
CAUTION:
file, you must upgrade all the modules in the CoreBuilder 9000 chassis, including the EME module, to major software Release 3.0. You cannot run Release 3.0 software on some modules and not on other modules. See Table 1 in this chapter for more information about the software version that each CoreBuilder 9000 component requires.
®
9000 Layer 2 switching module software Release 3.0.
CoreBuilder
Except for the Enterprise Management Controller (EMC) boot
9000 software Release 3.0 requires that the
show eme
CPU Ram Size(MB)
8
or
from the EME command
field on the left side of the screen
.
20
The EMC boot file remains at software Release 2.1.0.
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VERVIEW
See “Installation and Upgrade Prerequisites”, in Chapter 4 “Software Installation”, for information about how to determine the software release on each module in the chassis.

Supported Modules

CAUTION:
Before you attempt to download any module software, save the configuration file for the release that you are currently running to an external device using the EME
upload
CoreBuilder 9000 Enterprise Management Engine User Guide
explanation of how to use the EME
command. See the
upload
command.
for an
Software Release 3.0 applies to the following 3Com CoreBuilder 9000 Layer 2 switching modules:
20-port 10/100BASE-TX Fast Ethernet Layer 2 Switching Module (Model Number 3CB9LF20R)
36-port 10/100BASE-TX Fast Ethernet RJ-45 Layer 2 Switching Module (Model Number 3CB9LF36R)
36-port 10/100BASE-TX Fast Ethernet Telco Layer 2 Switching Module (Model Number 3CB9LF36T)
36-port 10/100BASE-TX Desktop Switching Module (RJ-45 Connectors) (Model Number 3CB9LF36RL)
36-port 10/100BASE-TX Desktop Switching Module (RJ-21 Telco Connectors) (Model Number 3CB9LF36TL)
10-port 100BASE-FX Fast Ethernet Layer 2 Switching Module (Model Number 3CB9LF10MC)
20-port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module (Model Number 3CB9LF20MM)
9-port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module (Model Number 3CB9LG9MC)
These Fast Ethernet and Gigabit Ethernet Layer 2 switching modules are intelligent LAN interface modules with embedded management agents that support standard Simple Network Management Protocol (SNMP) Management Information Bases (MIBs).

System Requirements

9
System Requirements
Each CoreBuilder 9000 Enterprise Switch has these minimum system requirements:
One switch fabric module installed in the CoreBuilder 9000 chassis with appropriate software:
For all CoreBuilder 9000 chassis: One 24-port Gigabit Ethernet Switch Fabric Module (Model Number 3CB9FG24 or Model Number 3CB9FG24T)
For the 7-slot chassis and 8-slot chassis: One 9-port Gigabit Ethernet Switch Fabric Module (Model Number 3CB9FG9)
One Enterprise Management Engine (Model Number 3CB9EME) installed in the CoreBuilder 9000 chassis with appropriate software
Boot Code and
Operational Code
Table 1 lists the minimum compatible software releases for the switch fabric modules and management modules that are required for operation with any Fast Ethernet or Gigabit Ethernet Layer 2 switching module that has software Release 3.0 installed.
CAUTION:
Except for the EMC boot file, you must update all module
software to Release 3.0.
Ta b le 1
Module Name Model Number
20-port 10/100BASE-TX Fast Ethernet Layer 2 Switching Module
36-port 10/100BASE-TX Fast Ethernet RJ-45 Layer 2 Switching Module
36-port 10/100BASE-TX Fast Ethernet Telco Layer 2 Switching Module
36-port 10/100BASE-TX Desktop Switching Module (RJ-45 Connectors)
36-port 10/100BASE-TX Desktop Switching Module (RJ-21 Telco Connectors)
10-port 100BASE-FX Fast Ethernet Layer 2 Switching Module
20-port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module
Software Compatibility Requirements for Layer 2 Switching Modules
3CB9LF20R 3.0.0 lf20r30000.all
3CB9LF36R 3.0.0 lf36r30000.all
3CB9LF36T 3.0.0 lf36t30000.all
3CB9LF36RL 3.0.0 lf36rtl30000.all
3CB9LF36TL 3.0.0 lf36rtl30000.all
3CB9LF10MC 3.0.0 lf10mc30000.all
3CB9LF20MM 3.0.0 lf20mm30000.all
Minimum Software Requirements
Filename
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Ta b le 1
Module Name Model Number
9-port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module
24-port Gigabit Ethernet Switch Fabric Module, 4 trunks
24-port Gigabit Ethernet Switch Fabric Module, 12 trunks
9-port Gigabit Ethernet Switch Fabric Module
Enterprise Management Engine (EME) 3CB9EME Management boot code 3.0.0
Enterprise Management Controller (EMC)
Software Compatibility Requirements for Layer 2 Switching Modules (continued)
Minimum Software Requirements
3CB9LG9MC 3.0.0 lg9mc30000.all
3CB9FG24 3.0.0 fga2430000.all
3CB9FG24T 3.0.1 fga24t30001.all
3CB9FG9 3.0.1 fg930001.all
Management operational code
3.0.0
Controller boot code 2.1.0
Controller operational code 3.0.0
3CB9EMC Controller boot code 2.1.0
Controller operational code 3.0.0
Optional Switch
Fabric Module
In the CoreBuilder 9000 8-slot chassis and 16-slot chassis, you can install a second Gigabit Ethernet Switch Fabric Module for redundancy.
Redundancy
CAUTION:
If you install a second Gigabit Ethernet Switch Fabric Module for redundancy, it must be the identical type of module as the one that is currently installed. For more information about switch fabric module redundancy, see the
9-Port Gigabit Ethernet Switch Fabric Module Quick Start Guide for the CoreBuilder 9000 Enterprise Switch Gigabit Ethernet Switch Fabric Module Quick Start Guide for the CoreBuilder 9000 Enterprise Switch
.
Filename
eme30000.bt
eme30000.op
emcv20100.bt
emc30000.op
emcv20100.bt
emc30000.op
, and the
24-Port
Optional
Management
Redundancy
The required Enterprise Management Engine (EME) provides both management and controller functions in the chassis. To have redundant management and controller functions in any chassis type (7-slot chassis, 8-slot chassis, and 16-slot chassis), install a second EME. To have only redundant controller functions in any chassis type, install an Enterprise Management Controller (EMC).
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Software Release 3.0 includes the following changes:
Web-based Management
ISO Date and Time Format
New Modules
IGMP
10/100 Mbps Ethernet Port Monitoring
RMON Monitoring Applications
802.1p CoS
Loop Detection
Bridge Address Learning Limits
Secure Address Learning Mode
IGHLIGHTS
H
Configuring One Untagged System VLAN
Broadcast, Multicast, and Flood Rate Limiting
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Web-based Management

Software Release 3.0 supports the Web Management suite of features, which consists of embedded Web Management applications and installable tools:
Embedded Web Management applications
— Use the embedded Web Management applications, which are part of the system software image, for most of your device configuration and management tasks. You can manage a single port or device, or, using multiple windows, you can manage multiple devices. This software contains:
WebConsole
DeviceView
— An HTML-based set of configuration forms.
— A Java-based application that displays a real-time image of the device. You can manage each port or module, or the entire system, by clicking the part of the image that you want to manage.
— Access to the configuration form on which you set up the
Help
installable Help, as well as access to links to support information on the 3Com Web site.
Installable tools
Software CD
the
DeviceView accessories
— The following optional tools are available from
:
— To set up e-mail notification for
Status Logging.
WebManage Framework
— To group your access links to the
devices that you manage.
Filter Builder
— To create filters for packets on your Layer 3
switching modules only.
Form-specific Help
— To access hypertext information about the
fields in the WebConsole and DeviceView applications.
For information about how to install and use the Web Management applications, see the
CoreBuilder 9000 Enterprise Switch
Web Management User Guide for the
.

ISO Date and Time Format

13
ISO Date and Time Format

New Modules

The format for date and time has changed for Release 3.0 to the following syntax and now complies with ISO 8601:
YYYY-MM-DDThh:mm:ss
Ta b le 2
Format Description
YYYY Year (1999 – 2098)
MM Month (01 – 12)
DD Day (01 – 31)
T Time designator (the literal character “T”)
hh Hour (00 – 24)
mm Minute (00 – 59)
ss Second (00 – 59)
Example:
Date and Time
2000-02-05T03:25:34
Software Release 3.0 supports the following new modules:
The 20-port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module (Model Number 3CB9LF20MM). The module has twenty 100 Mbps Ethernet fiber-optic ports with MT-RJ connectors on its front panel and two 1-Gigabit port for connection to the chassis backplane. It occupies a single interface module slot in the CoreBuilder 9000 7-slot, 8-slot, and 16-slot chassis.
The 36-port 10/100BASE-TX Desktop Switching Module (RJ-45 Connectors) (Model Number 3CB9LF36RL). The module has thirty-six 10/100 Mbps Ethernet ports with RJ-45 connectors on the front panel and one 1-Gigabit port for connection to the chassis backplane. It occupies a single interface module slot in the CoreBuilder 9000 7-slot, 8-slot, and 16-slot chassis.
The 36-port 10/100BASE-TX Desktop Switching Module (RJ-21 Telco Connectors) (Model Number 3CB9LF36TL). The module has three RJ-21 connectors on the front panel. Each RJ-21 connector contains 12 switched 10/100 Mbps Ethernet ports, for a total of 36 switched ports. The module has one 1-Gigabit port for connection to the chassis backplane. It occupies a single interface module slot in the CoreBuilder 9000 7-slot, 8-slot, and 16-slot chassis.
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IGMP

10/100 Mbps Ethernet Port Monitoring

The Internet Group Management Protocol (IGMP) ensures that multicast traffic is forwarded from the local router to multicast group members on directly attached subnetworks. The Snooping function monitors IGMP packets to ensure that multicast traffic is
only
forwarded to areas of the network that contain multicast group members. Unlike the Distance Vector Multicast Routing Protocol (DVMRP), IGMP functions do not relate to multicast packet delivery between routers. IGMP functions include:
Querying
Snooping
This feature, which is enabled by default, is designed to:
Monitor 10/100 Mbps Ethernet ports for excessive collisions, multiple collisions, late collisions, runts, and FCS errors.
Compare these error counters against predetermined thresholds.
Disable a port that reaches an error threshold.
Report the reason that a port is disabled to the Administration Console, MIB databases, and SNMP traps.
Reenable the port after an initial backoff time interval.
Continue monitoring.
See “Port Monitoring” in Chapter 5 “Ethernet” in the
Implementation Guide
for information about the new Ethernet port
monitoring feature.
CoreBuilder 9000

RMON Monitoring Applications

15
RMON Monitoring Applications

802.1p CoS

New versions of LANsentry® Manager are being released. You can use LANsentry Manager to monitor traffic and error rates for hosts on a network, along with traffic flows between these hosts. When you set up LANsentry Manager with the CoreBuilder 9000, take these factors into consideration:
To access a CoreBuilder 9000 module, use the community string plus extension format as follows:
<community string>@slot_<slot>.<subslot>
For switch fabric modules use this format:
<community string>@fabric
For example, to access a module in slot 4 using the read/write community string of “private”, enter
If you have any problems connecting to the CoreBuilder 9000 using
private@slot_4.1
LANsentry Manager, increase the SNMP timeout values.
See “Remote Monitoring (RMON)” in Chapter 21”Device Monitoring” of
CoreBuilder 9000 Implementation Guide
the
for more details.
802.1p Class of Service (CoS) focuses on traffic class and dynamic multicast filtering services in bridged LANs. It addresses separate queuing of time-critical frames to reduce the jitter caused by multicast flooding.
802.1p uses the same tag format as 802.1Q, but uses three additional bits of the tag control information for setting a user priority level.

Loop Detection

The 36-port 10/100BASE-TX Desktop Switching Modules (Model Numbers 3CB9LF36RL and 3CB9LF36TL) recognize Spanning Tree packets but these modules do not participate in Spanning Tree. Instead, the modules can implement a separate loop-detection algorithm on all of their front-panel ports.
This algorithm acts only on the 36-port 10/100BASE-TX Desktop Switching Module front-panel ports, and does not act on other Layer 2 modules in the CoreBuilder 9000 system.
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You configure the front-panel ports to participate in this algorithm using three options in the
disable
— This default setting disables the module’s port-based
bridge loopdetectmode
menu:
algorithm.
enable
— When you configure the module using the
loopdetectmode enable
option, the module searches for traffic
bridge
loops by comparing Spanning Tree Bridge Protocol Data Unit (BPDU) packets that enter its backplane port with BPDU packets that enter its front-panel ports. If the module detects the same BPDU packet coming through both its backplane port and any front-panel port, the module:
Disables the front-panel port where the BPDU packet entered.
Sends a trap to the EME.
Displays
bridge port summary
loop detect
for the port status in the
bridge port detail
and
displays.
immediate
— When you configure the module using the
loopdetectmode immediate
option, the module searches for
bridge
any Spanning Tree BPDU packets that are received on its front-panel ports. If the module detects that a BPDU packet is received on any front-panel port, the module:
Disables the front-panel port where the BPDU packet entered.
Sends a trap to the EME.
Displays
bridge port summary
bpdu detect
for the port status in the
bridge port detail
and
displays.
Loop Detection
17
When the module disables a front-panel port to eliminate a loop, you must bring the port back online manually.
Example:
CB9000@slot 5.1 [36L-E/FEN-TX-L2] (): bridge Menu options (CoreBuilder 9000-10AD6C):
---------------------------------------­display - Display bridge information agingTime - Set the bridge address aging time cos - Administer COS priority queues port - Administer bridge ports multicast - Administer multicast filtering vlan - Administer VLANs loopDetectMode - Set Loop Detect mode learnMode - Set the bridge learning mode
CB9000@slot 1.1 [36L-E/FEN-TX-L2] (bridge): loopdetectmode Enter new value (disable,enable,immediate) [disable]: enable
CB9000@slot 1.1 [36L-E/FEN-TX-L2] (bridge): display
agingTime mode addrTableSize
300 bridgeRepeater 138
addressCount peakAddrCount learnMode
2 4 normal
multicastLimit broadcastLimit floodLimit
50000 50000 50000
loopDetectMode loopDetectSrcAddress
enable 08-00-8f-75-48-86
CB9000@slot 1.1 [36L-E/FEN-TX-L2] (bridge/port): summary 1
rxFrames rxDiscards txFrames
5301100 0 2688802
portNumber loopDetectStatus
1 loop detect
learnStatus addressLimit
active 4
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CB9000@slot 1.1 [36L-E/FEN-TX-L2] (bridge/port): detail 1
rxFrames rxSameSegDiscs
5301100 0
rxNoDestDiscs rxErrorDiscs rxMcastLimitType
0 0 BcastOnly
rxMcastLimit rxMcastExcDiscs rxMcastExceeds
4000 0 0
rxSecurityDiscs rxOtherDiscs rxForwardUcasts
0 0 13202
rxFloodUcasts rxForwardMcasts txFrames
0 2675600 2688802
portNumber loopDetectStatus learnStatus
1 loop detect active
addressLimit
4
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