Cisco Systems SCE 2000 4xGBE User Manual 2
SCE 2000 4xGBE
Installation and Configuration Guide
Version 2.5.7
OL-7824-02
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SCE 2000 4xGBE Installation and Configuration Guide
Copyright © 2002-2005 Cisco Sy stems, Inc.
All rights reserved.
Preface v
Audience v
Organization vi
Related Publications vii
Document Conventions viii
Obtaining Documentation ix
Cisco.com ix
CONTENTS
Documentation Feedback ix
Obtaining Technical Assistance ix
Cisco Technical Support Website ix
Submitting a Service Request x
Definitions of Service Request Severity x
Obtaining Additional Publications and Information x
Introduction 1-1
SCE Platform Management Interfaces 1-2
Overview of the SCE 2000 Platform 2-1
Service Control and the SCE Platform 2-1
The SCE Platform 2-1
Service Control Management 2-2
Front Panel 2-3
Back Panel 2-6
Checking the Shipping Container Contents 2-7
SCE 2000 Component List 2-7
SCE 2000 Installation Checklist 2-8
Topology 3-1
The SCE 2000 Platform 3-1
Topology Considerations 3-1
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Contents
Functionality 3-2
Number of links 3-2
Redundancy 3-2
Link Continuity 3-3
Physical Topologies 3-4
Single SCE 2000 Topologies 3-4
Two Cascaded SCE 2000s For Dual Links 3-6
Topology-Related Parameters 3-7
Installation and Maintenance 4-1
Preparing to Install the SCE 2000 Platform 4-1
Tools and Parts Required 4-2
Site Requirement Guidelines 4-3
Installing the SCE 2000 Platform 4-4
Installation Precautions 4-5
Installing the SCE 2000 on a Workbench or Tabletop 4-6
Rack-Mounting a SCE 2000 Platform 4-7
Attaching a Chassis Ground Connection 4-13
Power Supply Overview 4-16
LEDs 4-17
Power Supply Specifications 4-18
Removing and Replacing a Power Supply Unit 4-19
Powering Down the Power Supply Unit and Disconnecting Input Power 4-19
Removing the Power Supply Unit 4-21
Replacing the Power Supply Unit 4-21
Reconnecting the Power 4-22
Fan Module Overview 4-25
Removing and Replacing the Fan Module 4-25
Replacing the Battery 4-28
Connecting the Management Interfaces and Performing Initial System
Configuration 5-1
Connecting the Local Console 5-1
Setting Up the Local Console 5-2
Initial System Configuration 5-3
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Step 1: Configuring Initial Settings 5-6
Step 2: Configuring the Hostname 5-7
Step 3: Setting the Passwords 5-7
Step 4: Configuring Time Settings 5-8
Step 5: Configuring the DNS Settings 5-10
Step 6: Configuring the RDR Formatter Destination 5-12
Step 7: Configuring Access Control Lists (ACLs) 5-13
Step 8: Configuring SNMP 5-17
Step 9: Configuring the Topology-Dependent Parameters 5-20
Step 10: Completing and Saving the Configuration 5-24
Connecting the Management Interface 5-26
Cabling the Management Port 5-27
Verifying Management Interface Connectivity 5-28
Contents
Cabling the Line Ports and Completing the Installation 6-1
Connecting the line ports to the network 6-1
Cabling Diagrams 6-2
Configuring the GBE Interface Parameters 6-7
Connecting the GBE Line Interface Ports 6-8
Testing Connectivity: Examining Link LEDs and Counters 6-10
Installing a Cascaded System 6-12
CLI Commands 6-13
Loading and Activating a Service Control Application 6-16
Basic SCE 2000 Platform Operations 7-1
Starting the SCE 2000 Platform 7-1
Checking Conditions Prior to System Startup 7-1
Starting the System and Observing Initial Conditions 7-2
Final Tests 7-3
Managing SCE 2000 Configurations 7-4
Viewing Configuration 7-4
Saving the Configuration Settings 7-7
Recovering a Previous Configuration 7-9
Performing Complex Configurations 7-10
Rebooting and Shutting Down the SCE Platform 7-11
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Contents
Rebooting the SCE Platform 7-11
Shutting Down the SCE Platform 7-12
Troubleshooting 8-1
Troubleshooting Overview 8-1
Troubleshooting Tools 8-2
Problem Solving Using a Subsystems Approach 8-9
Identifying Startup Problems 8-9
Troubleshooting the Power Subsystem 8-9
Troubleshooting the Firmware Package Installation 8-11
Troubleshooting the Management Subsystem 8-12
Troubleshooting the Link Interface Subsystem 8-14
The External Optical Bypass Module A-1
External Optical Bypass Functionality A-2
The External Optical Bypass Module Front Panel A-4
Installing the External Bypass Module A-5
Installing the Module in a Rack A-5
Cabling the External Optical Bypass Module A-6
Specifications A-9
Index 1
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Audience
Preface
This preface describes who should read the SCE 2000 4xGBE Installation and Configuration
Guide, how it is organized, and its document conventions
This guide is for the networking or computer technician responsible for installing and configuring
the SCE 2000 platform on-site. To use this publication, you should be familiar with
telecommunications equipment and installation procedures, as well as electronic circuitry and
wiring practices. You should also have experience as an electronic or electromechanical
technician.
This installation guide explains the initial hardware installation and basic configuration
procedures for the SCE 2000. It contains procedures for unpacking and installing the device and
performing basic configuration via the setup wizard. After completing the installation and basic
configuration procedures covered in this guide, you will then use the appropriate companion
publications to more completely configure your system.
This guide contains instructions on how to install and run the SCE 2000 Platform. This guide
assumes a basic familiarity with telecommunications equipment and installation procedures.
SCE 2000 4xGBE Installation and Configuration Guide
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Organization
Organization
The major sections of this guide are as follows:
Chapter Title Description
1 Introduction (on page 1-1) This chapter provides a brief introduction to Cisco Service
2 Overview ( on page 2-1) This chapter provides a hardware overview of the SCE
3 Topology (on page 3-1) This chapter describes the possible deployment topologies
Preface
Control.
2000 platform.
of the SCE 2000 and explains how various aspects of the
topology determine the configuration of the system.
4 Installation and
Maintenance (on page 4-
1)
5 Connecting the
Management Interfaces
and Performing Initial
System Configuration (on
page 5-1)
6 Cabling the Line Ports
and Completing the
Installation (on page 6-1)
7 Basic SCE 2000 Platform
Operations (on page 7-1)
8 Troubleshooting (on page
8-1)
A The External Optical
Bypass Module (on page
A-1)
This chapter explains how to install a SCE 2000 platform
in a rack or in a general tabletop installation and how to
install or replace the power supply units and fan modules.
This chapter explains how to connect the SCE 2000
platform to a local console and perform the initial system
configuration via the setup wizard that runs automatically.
This chapter provides instructions for cabling the Gigabit
Ethernet ports for both one and two SCE 2000 topologies,
and for configuring Gigabit Ethernet (GBE) interface
parameters. In a topology utilizing two SCE 2000s
(cascade), this includes the cascade ports as well as the
line ports.
This chapter describes how to start up the SCE 2000
platform, reboot, and shutdown. It also describes how to
manage configurations.
This chapter provides basic system startup troubleshooting
information.
This appendix explains how to install the external optical
bypass module.
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vi OL-7824-02
Preface
Related Publications
Your SCE 2000 platform and the software running on it contain extensive features and
functionality, which are documented in the following resources:
• Cisco CLI software:
•
Cisco Service Control Engine (SCE) Software Configuration Guide
•
Cisco Service Control Engine (SCE) CLI Command Reference
Related Publications
Note
You can access Cisco software configuration and hardware installation and maintenance documentation
on the Worl d W i de Web at Cisco Website URL http://www.cisco.com. Translated documentation is
available at the following URL: International Cisco Webs ite
(http://www.cisco.com/public/countries_languages.shtml)
• For initial installation and startup information, refer to the SCE 2000 4xGBE
• For international agency compliance, safety, and statutory information for wide-area network
(WAN) interfaces for the SCE 2000 platform, refer to the
Information for the Cisco Service Control Engine (SCE)
• For installation and configuration of the other components of the Service Control
.
Regulatory Compliance and Safety
Quick Start Guide
Management Suite refer to:
•
Subscriber Management User Guide
•
Collection Manager User Guide
•
Service Control Application Suite for Broadband User Guide
•
Service Control Application Suite for Broadband Installation Guide
• To view Cisco documentation or obtain general information about the documentation, refer to
the following sources:
• Obtaining Documentation (on page ix)
• The Cisco Information Packet that shipped with your SCE 2000 platform.
.
SCE 2000 4xGBE Installation and Configuration Guide
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Document Conventions
Document Conventions
Command descriptions use the following conventions:
boldface font Commands and keywords are in boldface.
italic font Arguments for which you supply values are in italics.
[ ] Elements in square brackets are optional.
{x | y | z} Alternative keywords are grouped in braces and separated by
[x | y | z] Optional alternative keywords are grouped in brackets and separated
string A nonquoted set of characters. Do not use quotation marks around
Screen examples use the following conventions:
screen font
vertical bars.
by vertical bars.
the string, or the string will include the quotation marks.
Terminal sessions and information the system displays are in
screen font.
Preface
boldface screen font Information you must enter is in boldface screen font.
italic screen font Arguments for which you supply values are in italic screen
font.
^
The symbol ^ represents the key labeled Control—for example, the
key combination ^D in a screen display means hold down the
Control key while you press the D key.
< >
[ ]
!, #
Nonprinting characters, such as passwords, are in angle brackets.
Default responses to system prompts are in square brackets.
An exclamation point (!) or a pound sign (#) at the beginning of a
line of code indicates a comment line.
Note
Notes, cautionary statements, and safety warnings use these conventions.
Means reader take note. Notes contain helpful suggestions or references to materials not contained in
this manual.
Warning
Means reader be careful. You are capable of doing something that might result in equipment damage or
loss of data.
SCE 2000 4xGBE Installation and Configuration Guide
viii OL-7824-02
Preface
Obtaining Documentation
Cisco documentation and additional literature are available on Cisco.com http://www.cisco.com.
Cisco also provides several ways to obtain technical assistance and other technical resources.
These sections explain how to obtain technical information from Cisco Systems.
Cisco.com
You can access the most current Cisco documentation at this URL
http://www.cisco.com/univercd/home/home.htm.
You can access the Cisco website at this URL http://www.cisco.com.
You can access international Cisco websites at this URL
(http://www.cisco.com/public/countries_languages.shtml).
Documentation Feedback
You can send comments about technical documentation to this URL (http://www.bug-
doc@cisco.com).
Obtaining Documentation
You can submit comments by using the response card (if present) behind the front cover of your
document or by writing to the following address:
Cisco Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883
We appreciate your comments.
Obtaining T echnical Assistance
For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, the
Cisco Technical Assistance Center (TAC) provides 24-hour-a-day, award-winning technical
support services, online and over the phone. Cisco.com http://www.cisco.com features the Cisco
TAC website as an online starting point for technical assistance. If you do not hold a valid Cisco
service contract, please contact your reseller.
Cisco T echnical Support Website
The Cisco T AC website (http://www.cisco.com/tac) provides online documents and tools for
troubleshooting and resolving technical issues with Cisco products and technologies. The Cisco
TAC website is available 24 hours a day, 365 days a year.
Accessing all the tools on the Cisco TAC website requires a Cisco.com user ID and password. If
you have a valid service contract but do not have a login ID or password, register at this URL
(http://tools.cisco.com/RPF/register/register.do).
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Obtaining Additional Publications and Information
Submitting a Service Request
Using the online TAC Service Request Tool (http://www.cisco.com/techsupport/servicerequest) is
the fastest way to open S3 and S4 service requests. (S3 and S4 service requests are those in which
your network is minimally impaired or for which you require product information.) After you
describe your situation, the TAC Service Request Tool automatically provides recommended
solutions. If your issue is not resolved using the recommended resources, your service request will
be assigned to a Cisco TAC engineer.
For S1 or S2 service requests or if you do not have Internet access, contact the Cisco TAC by
telephone. (S1 or S2 service requests are those in which your production network is down or
severely degraded.) Cisco TAC engineers are assigned immediately to S1 and S2 service requests
to help keep your business operations running smoothly.
To open a service request by telephone, use one of the following numbers:
Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227)
EMEA: +32 2 704 55 55
USA: 1 800 553-2447
Preface
A complete listing of Cisco TAC contacts (http://www.cisco.com/techsupport/contacts) is
available online.
Definitions of Service Request Severity
To ensure that all cases are reported in a standard format, Cisco has established severity
definitions.
Severity 1 (S1)—Your network is “down” or there is a critical impact to your business operations.
You and Cisco will commit all necessary resources around the clock to resolve the situation.
Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of
your business operation are negatively affected by inadequate performance of Cisco products. You
and Cisco will commit full-time resources during normal business hours to resolve the situation.
Severity 3 (S3)—Operational performance of your network is impaired, but most business
operations remain functional. You and Cisco will commit resources during normal business hours
to restore service to satisfactory levels.
Severity 4 (S4)—You require information or assistance with Cisco product capabilities,
installation, or configuration. There is little or no effect on your business operations.
Obtaining Additional Publications and Information
Information about Cisco products, technologies, and network solutions is available from various
online and printed sources.
• Cisco Marketplace (http://www.cisco.com/go/marketplace/) provides a variety of Cisco
books, reference guides, and logo merchandise.
• The Cisco Product Catalog describes the networking products offered by Cisco Systems, as
well as ordering and customer support services.
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Preface
Obtaining Additional Publications and Information
• Cisco Press (http://www.ciscopress.com) publishes a wide range of general networking,
training and certification titles. Both new and experienced users will benefit from these
publications. For current Cisco Press titles and other information, go to Cisco Press
(http://www.ciscopress.com).
• Packet (http://www.cisco.com/packet) magazine is the Cisco Systems technical user magazine
for maximizing Internet and networking investments. Each quarter, Packet delivers coverage
of the latest industry trends, technology breakthroughs, and Cisco products and solutions, as
well as network deployment and troubleshooting tips, configuration examples, customer case
studies, certification and training information, and links to scores of in-depth online resources.
• iQ Magazine (http://www.cisco.com/go/iqmagazine) is the quarterly publication from Cisco
Systems designed to help growing companies learn how they can use technology to increase
revenue, streamline their business, and expand services. The publication identifies the
challenges facing these companies and the technologies to help solve them, using real-world
case studies and business strategies to help readers make sound technology investment
decisions.
• Internet Protocol Journal (http://www.cisco.com/ipj) is a quarterly journal published by Cisco
Systems for engineering professionals involved in designing, developing, and operating public
and private internets and intranets.
• World-class networking training is available from Cisco. You can view current offerings at
this URL (http://www.cisco.com/en/US/learning/index.html).
SCE 2000 4xGBE Installation and Configuration Guide
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CHAPTER 1
Introduction
This chapter contains the following sections:
• SCE Platform Management Interfaces 1-2
The Service Control Engine family of programmable network devices is capable of performing
stateful flow inspection of IP traffic, and controlling that traffic based on configurable rules. The
Service Control Engine platforms provide a real-time classification of network usage through
programmable, stateful inspection of bi-directional traffic flows and the mapping of these flows
with user ownership.
The following diagram demonstrates a deployment of an SCE 2000 platform in the network.
Figure 1-1: SCE Platform in the Network
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SCE Platform Management Interfaces
SCE Platform Management Interfaces
You can manage the SCE 2000 platform through either of its management interfaces, CLI or
SNMP. Both these interfaces provide management access to the same database of the SCE 2000
platform; any configuration changes made through one interface are also reflected through the
other interface.
• CLI (Command Line Interface). The CLI is accessible through the Console port or through a
Telnet connection. The CLI is the interface described throughout this manual. Command Line
Interface further discusses the CLI.
• SNMP (Simple Network Management Protocol). You can use SNMP as an interface for
monitoring the variables as defined in the MIB-II and Cisco’s propriety MIB specifications.
For information on enabling SNMP, see SNMP Interface
Chapter 1 Introduction
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CHAPTER 2
Overview of the SCE 2000 Platform
This chapter provides a brief overview of the Cisco Service Control concept and an introduction
to the SCE 2000 4xGBE Platform, the Service Control hardware component.
This chapter contains the following sections:
• Service Control and the SCE Platform 2-1
• Front Panel 2-3
• Back Panel 2-6
• Checking the Shipping Container Contents 2-7
• SCE 2000 Installation Checklist 2-8
Service Control and the SCE Platform
The Cisco Service Control concept is delivered through a combination of purpose-built hardware
and specific software solutions that address various Service Control challenges faced by service
providers.
The SCE Platform
The Service Control Engine (SCE) platform, which is the hardware component of the Cisco
Service Control solution, is designed to support observation, analysis, and control of Internet/IP
traffic. The SCE platform is a purpose-built network device making use of ASIC components and
RISC processors to go beyond packet counting and delve deeper into the contents of network
traffic to do the following:
• Provide programmable, stateful inspection of bi-direction traffic flows
• Map these flows with user ownership
• Provide a real-time classification of network usage, which is the basis of the SCE platform
advanced traffic control and bandwidth shaping functionality.
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Service Control and the SCE Platform
Table 2-1 SCE Platform Model Information
Model number SCE 2020 4xGBE
Link Type Gigabit Ethernet
Number of Ports 4
Number of Links 2
Service Control Management
The Service Control solution includes a complete management infrastructure that provides the
following management components to manage all aspects of the Service Control solutions:
• Network management: complete network FCAPS Management (Fault, Configuration,
Accounting, Performance, Security) is provided via either CLI or SNMP.
• Subscriber management: subscriber awareness (mapping network IDs to subscriber IDs) and
integration with AAA devices such as Radius or DHCP servers is provided by the Subscriber
Manager (SM).
Chapter 2 Overview of the SCE 2000 Platform
• Service Configuration Management: ability to configure the general service definitions of a
Service Control application via an XML configuration file.
These management interfaces are designed to comply with common management standards and to
easily integrate with existing OSS infrastructure.
Figure 2-1: Service Control Management Infrastructure
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Chapter 2 Overview of the SCE 2000 Platform
Front Panel
The SCE 2000 Front Panel consists of ports and LEDs as shown in the following figure and
tables.
Figure 2-2: SE2000 Front Panel
Front Panel
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Front Panel
Chapter 2 Overview of the SCE 2000 Platform
T able 2-2 SCE 2000 Ports
Port Quantity Description Connect This Port To…
Mng1/
Mng2
2 10/100/1000 Ethernet RJ-45 ports for
management of the SCE 2000.
Mng 2 is currently not operational.
CLI designation: 0/0.
Console 1 RS-232 RJ-45 port for use by
technicians
AUX 1 RS-232 RJ-45 port used by technicians
GBE ports 1-4 4 GigabitEthernet SC ports for connecting
to the line and/or cascading two devices
CLI designation: 0/1 through 0/4
T able 2-3 SCE 2000 LED Groups
LED Groups Description
Power A
• Continuous green: Power supply A is functioning normally
A LAN using an FE cable
with an RJ-45 connector
A local terminal (console)
using an RS-232 cable with
an RJ-45 connector, as
provided in the SCE 2000
kit.
Refer to Connecting the Line
Ports (Connecting the Line
Ports "Connecting the line
ports to the network" on
page 6-1) for cabling
diagrams for various
topologies
• Red: Power supply A present, but malfunctioning
• Unlit: Power supply A is either not present or has failed.
Power B
• Continuous green: Power supply B is functioning normally
• Red: Power supply B present, but malfunctioning
• Unlit: Power supply B is either not present or has failed.
Status The Status LED indicates the operational status of the SCE 2000 system, as
follows:
• Unlit: indicates no power from either power unit.
• Orange: indicates that the system is booting up.
• Flashing green: indicates that the system is fully operational.
• Flashing orange: indicates that the system is operational, but is in a warning
state.
• Red: indicates that there is a problem or failure
Note that Alarms are hierarchical: Failure takes precedence over Warning, which
takes precedence over operational.
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Chapter 2 Overview of the SCE 2000 Platform
LED Groups Description
Front Panel
Bypass
• Continuous green: indicates that the traffic bypasses the SCE 2000 through an
internal electrical bypass module.
Single SCE 2000 topology: The SCE 2000 is either in bypass or sniffing mode
Cascaded topology: Either the SCE 2000 is forwarding traffic to the other SCE
2000, where it is being processed, or is simply in bypass mode, so traffic
through it is not being processed.
• Unlit: traffic is not being bypassed
Single SCE 2000 topology: indicates normal operation of the SCE 2000
Cascaded topology: indicates normal operation of the active SCE 2000
GBE ports The GBE LEDs indicate the operational status of the SCE 2000 line ports, as
follows:
• Link
Green: indicates that the port link is up
Unlit: indicates that the port link is down
• Rx
Flashing Green: indicates that there are incoming packets
• Tx
Flashing Green: indicates that there are outgoing packets
Mng The Mng port LEDs indicate the operational status of the SCE 2000 out-of-band
LAN-based management port, as follows:
• Link/Active
Green: indicates that the port link is up
Unlit: indicates that the port link is down
• 10/100/1000
Steady green: indicates that the port is set to 100 Mbps
Unlit: indicates that the port is set to 10 Mbps
Orange: indicates that the port is set to 1000 Mbps
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Back Panel
Back Panel
Chapter 2 Overview of the SCE 2000 Platform
The SCE 2000 platform back-panel contains the following components:
• Two field-replaceable power supply units with ON/OFF switches
• A field-replaceable fan drawer
• Ground connections
• Two connectors to the external bypass module
The rear panels of both the AC- and DC-powered SCE 2000 platforms are shown in the following
pair of figures.
Figure 2-3: SCE 2000 Back Panel: AC Power
Figure 2-4: SCE 2000 Back Panel DC power
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Chapter 2 Overview of the SCE 2000 Platform
Checking the Shipping Container Contents
Use the SCE 2000 Components List to check the contents of the SCE 2000 platform shipping
container.
Do not discard the shipping container. You need the container if you move or ship the SCE 2000
platform in the future.
SCE 2000 Component List
T able 2-4 SCE 2000 Component List
Component Description Received
Checking the Shipping Container Contents
SCE 2000 platform SCE 2020 4xGBE platform configured with either AC or
DC power supplies.
Accessories The following accessories might arrive in separate shipping
containers:
• Rack mount kit • Two mounting brackets for 19” rack
• Six screws (Philips), 8-32 x 3/8” (for attaching the
brackets to the SCE 2000 chassis)
• supporting mounting brackets for 19” rack
• Two crossr ail supports for 19” rack with front and back
posts
• Management
cables
• Fast Ethernet cable for connecting to the Management
port
• RS-232 serial cable (DB-9 to RJ-45) for connecting to a
local terminal
• Power cables
Two AC power supply cords,if ordered with AC-input
power supply units
• Grounding kit • Grounding cable
• Two Hex nuts (#¼”)
• Two spring washers (#¼”)
• Documentation
If ordered, SCE 2000 hardware and software
documentation set and the Cisco Documentation CD-ROM
package*
Optional Equipment Four rubber feet for tabletop installation
External Optical
Bypass module kit
• 1 External Optical Bypass module
• 1 19" rack mounting panel
• 1 control cable
*Titles and quantities of documents will vary. You must order the type and quantity of documentation
sets when you order the hardware.
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Chapter 2 Overview of the SCE 2000 Platform
Note
We no longer ship the entire SCE 2000 documentation set automatically with each system. You must
specifically order the documentation as part of the sales order. If you ordered documentation and did
not receive it, we will ship the documents to you within 24 hours. To order documents, contact a
customer service representative.
SCE 2000 Installation Checklist
To assist you with your installation and to provide a historical record of what was done by whom,
photocopy the following SCE 2000 Installation Checklist. Indicate when each procedure or
verification is completed. When the checklist is completed, place it in your site log along with the
other records for your new SCE 2000 platform.
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Chapter 2 Overview of the SCE 2000 Platform
T able 2-5 SCE 2000 Installation Checklist
SCE 2000 Installation Checklist
Task Verified
Date
By
Date SCE 2000 received
SCE 2000 and all accessories unpacked
Safety recommendations and guidelines reviewed
Topology verified: number of SCE 2000 platforms, number of links, and
whether inline or receive-only
Installation Checklist copied
Site log established and background information entered
Site power voltages verified
Site environmental specifications verified
Required passwords, IP addresses, device name s, and so on, needed for
initial configuration available (refer to Setup Command Parameters (on
page 5-3))
Required tools available
Network connection equipment available
SCE 2000 mounted in rack (optional)
AC/DC power cables connected to AC/DC sources and SCE 2000 platfo r m
Console port set for 9600 baud, 8 data bits, n o pari t y , a nd 1 stop bit (9 60 0
8N1)
ASCII terminal attached to console port
FE management port is operational
GBE line and cascade ports operational
Network interface cables and devices connected
System power turned on
System boot complete (SYSTEM–UP LED is on)
Correct hardware configuration displayed after system banner appears
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CHAPTER 3
T opology
This chapter describes the possible deployment topologies of the SCE 2000. The Cisco SCE
solution offers a number of basic topology options that permit the user to tailor the SCE Platform
to fit the needs of a particular installation. An understanding of the various issues and options is
crucial to designing, deploying, and configuring the topology that best meets the requirements of
the individual system.
This chapter contains the following sections:
• The SCE 2000 Platform 3-1
• Topology Considerations 3-1
• Physical T opologies 3-4
The SCE 2000 Platform
The SCE 2000 introduces a solution for dual links with load sharing and asymmetrical routing
and support for fail-over between two SCE platforms.
The SCE 2000 supports wire speed processing of full-duplex 2-Gigabit Ethernet streams. The
SCE 2000 can, therefore, be deployed in a multi-link environment, either in a single or dual SCE
platform topology.
• single SCE 2000 topology: Provides increased network capacity and the ability to process
both directions of a bi-directional flow, processing both the upstream and downstream paths
of a flow, even if they traverse different links
• dual SCE 2000 topology (cascade): cascaded SCE 2000s provide high-availability and fail-
over solution and maintain the line and service in case of SCE 2000 failure.
T opology Considerations
There are several issues that must be considered in order to arrive at the optimum configuration of
the topology-related parameters:
• Functionality: Will the system be used solely to monitor traffic flow, with report functionality
only, or will it be used for traffic flow control, with enforcement as well as report
functionality?
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Topology Considerations
• Number of links: The SCE 2000 may be connected to one or two GBE links. This is relevant
for both bump-in-the-wire and Receive-Only topologies.
• Redundancy: Must the system be designed to guarantee uninterrupted SCE 2000
functionality? If so, there must be a backup SCE 2000 Platform to assume operation in case of
failure of the primary device.
• Link continuity: How should the SCE 2000 respond to platform failure with regard to link
continuity? Should traffic flow continue even though the unit is not operating, or be halted
until the platform is repaired/replaced?
These issues determine three important aspects of system deployment and configuration:
• How many SCE 2000 Platforms are needed and how will they be installed?
• Physical topology of the system: The actual physical placement of the SCE 2000 in the
system.
• Topology-related configuration parameters: The correct values for each parameter must be
ascertained before configuring the system to make sure that the system will function in the
desired manner.
Chapter 3 Topology
Functionality
Number of links
Redundancy
The SCE 2000 can serve one of two general functions:
• Monitoring and Control: The SCE 2000 monitors and controls traffic flow. Decisions are
enforced by the SCE 2000 depending on the results of the monitoring functions of the SCE
2000 and the configuration of the Service Control Application for Broadband or Mobile
solution.
In order to perform control functions, the SCE 2000 must be physically installed as a bump-
in-the-wire, and the connection mode must be “Inline”.
• Monitoring only: The SCE 2000 monitors traffic flow, but cannot control it.
Either a bump-in-the-wire installation or an optical splitter installation may be used for
monitoring only. In the latter case connection mode must be “receive-only”.
The SCE 2000 can be deployed in a single GBE link or in two GBE links. The two-link topology
may implement load-sharing and the SCE 2000 in this case is able to process both directions of a
bi-directional flow even if they split to both links.
When a high degree of reliability is desired, a second SCE 2000 Platform should be installed to
provide backup operation capabilities. The combination of two SCE 2000s guarantees
uninterrupted functioning in case of a failure of one of the platforms. The two SCE 2000s are
cascaded, so that, although all processing is performed only in the active SCE 2000, the standby
SCE 2000 is constantly updated with all the necessary information so that it can instantly take
over processing the traffic on the data links should the active SCE 2000 fail.
If only preservation of the network links is required, and uninterrupted functionality of the SCE
2000 is not required, a single SCE 2000 is sufficient.
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Chapter 3 Topology
Link Continuity
Topology Considerations
The bypass mechanism of the SCE 2000 allows traffic to continue to flow, if desired, even if the
device itself is not functioning.
Note that when the SCE 2000 is connected to the network through an optical splitter, a failure of
the SCE 2000 does not affect the traffic flow, as the traffic continues to flow through the optical
splitter.
Bypass Mechanism
The SCE 2000 includes a Network Interface Card with a bypass mechanism that is enabled upon
SCE 2000 failure. In addition, when connected in-line it can also be enabled in normal operation
to simultaneously bypass traffic flow to the other side and direct it internally for analysis. In this
case it maintains "receive-only"-like monitoring functions, when control functionality is not
required.
The bypass card supports the following four modes:
• Bypass: The bypass mechanism preserves the network link, but traffic is not processed for
monitoring or for control.
• Forwarding: This is the normal operational mode, in which the SCE 2000 processes the
traffic for monitoring and control purposes.
• Sniffing: The bypass mechanism preserves the network link, while in parallel allowing the
SCE 2000 to process the traffic for monitoring only.
• Cutoff: There is no forwarding of traffic, and the physical link is forced down (cutoff
functionality at layer 1).
Maintaining the Network Links vs Maintaining SCE 2000 Platform
Functionality
When a single SCE 2000 is deployed, the user may decide that in case of a failure, maintaining
the network link is more important than providing the SCE 2000 functionality. In this scenario,
when the SCE 2000 detects a failure that requires a reboot process for recovering, it immediately
switches to Bypass mode, allowing all traffic to bypass the SCE 2000. The SCE 2000 stays in
Bypass mode maintaining the network link, albeit without SCE 2000 processing, until the SCE
2000 fully recovers from the failure and is ready to resume normal functioning.
Alternatively, the user may decide that the SCE 2000 functionality is sufficiently crucial to
require severing the link if the SCE 2000 platform fails. In this case, when the SCE 2000 detects a
failure that requires a reboot process for recovering, it immediately switches to Cutoff mode,
stopping all traffic flow. The SCE 2000 stays in Cutoff mode, halting all traffic, until it fully
recovers from the failure and is ready to resume normal functioning. In Cutoff the physical
interface is blocked, enabling the network device connected to the SCE 2000 to sense that the link
is down.
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Physical Topologies
Single Link: Receive-only Topology
In this topology, an optical splitter resides physically on the GBE link between the subscribers and
the network. The traffic passes through the optical splitter, which splits traffic to the SCE 2000.
The SCE 2000, therefore, only receives traffic and does not transmit.
Figure 3-1: Single SCE Platform Single Link: Receive-Only Topology
Chapter 3 Topology
When configuring the SCE 2000, an optical splitter topology is referred to as “receive-only”
connection mode.
Note that in an optical splitter topology, the SCE 2000 only enables traffic monitoring
Note
functionality.
When implementing receive-only topologies with a switch, the switch must support SPAN functionality
that includes separation between ingress and egress traffic and multiple SPAN-ports destinations.
Physical T opologies
Following are descriptions of a number of physical topologies that the SCE 2000 supports.
Single SCE 2000 T opologies
A single SCE 2000 supports both single GBE link and dual GBE link topologies.
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