Alcatel OmniSwitch 8800 Installation manual

Part No. 060183-10, Rev. D
December 2004
OmniSwitch 8800
Hardware Users Guide
www.alcatel.com

ii OmniSwitch 8800 Hardware Users Guide December 2004
This user guide documents OmniSwitch 8800
hardware, including chassis and associated components.
The specifications described in this guide are subject to change without notice.
Copyright © 2004 by Alcatel Internetworking, Inc. All rights reserved. This document may not be repro-
duced in whole or in part without the express written permission of Alcatel Internetworking, Inc.
Alcatel®and the Alcatel logo are registered trademarks of Alcatel. Xylan®, OmniSwitch®, OmniStack®,
and Alcatel OmniVista®are registered trademarks of Alcatel Internetworking, Inc.
OmniAccess™, Omni Switch/Router™, PolicyView™, RouterView™, SwitchManager™, VoiceView™,
WebView™, X-Cell™, X-Vision™, and the Xylan logo are trademarks of Alcatel Internetworking, Inc.
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
[phone] FAX [phone]
[email protected]
US Customer Support—[phone]
International Customer Support—[phone]
Internet—http://eservice.ind.alcatel.com

OmniSwitch 8800 Hardware Users Guide December 2004 iii
Contents
About This Guide .......................................................................................................... ix
Supported Platforms .......................................................................................................... ix
Who Should Read this Manual? ........................................................................................ ix
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 The OmniSwitch 8800 ...............................................................................................1-1
Application Example .......................................................................................................1-2
Availability Features .......................................................................................................1-3
Hardware Redundancy .............................................................................................1-3
Smart Continuous Switching ....................................................................................1-4
Software Rollback ....................................................................................................1-4
Hot Swapping ...........................................................................................................1-5
Hardware Monitoring ...............................................................................................1-5
Power Checking Sequence .......................................................................................1-6
Chapter 2 Chassis and Power Supplies ....................................................................................2-1
In This Chapter ................................................................................................................2-1
Chassis Specifications .....................................................................................................2-3
Chassis Slot Numbering ..................................................................................................2-6
Viewing Chassis Slot Information ...........................................................................2-7
Mounting the Switch .......................................................................................................2-8
Rack-Mounting .........................................................................................................2-9
Stand-Alone ............................................................................................................2-12
Power Supplies ..............................................................................................................2-13
1375 Watt DC-to-DC Power Supply ......................................................................2-15
DC Power Supply Connection ...............................................................................2-16
Connecting the DC Cable Harness to the Chassis Power Supply ...................2-16
Connecting the DC Cable Harness to the DC Power Source ..........................2-16

Contents
iv OmniSwitch 8800 Hardware Users Guide December 2004
Power Supply Redundancy ...........................................................................................2-17
Redundancy Defined .......................................................................................2-17
Adding a Power Supply ..........................................................................................2-17
Hot Swapping a Power Supply ...............................................................................2-17
Permanently Removing a Power Supply ................................................................2-18
Installing a Power Supply ......................................................................................2-19
Removing a Power Supply .....................................................................................2-22
Power Cords ..................................................................................................................2-24
Redundant AC Circuit Recommendation ......................................................................2-25
Grounding the Chassis ...........................................................................................2-26
Temperature Management ............................................................................................2-26
Temperature Errors ..........................................................................................2-27
Chassis Fan Trays .........................................................................................................2-28
Monitoring Fan Tray Status .............................................................................2-30
Fan Redundancy ..............................................................................................2-30
Hot Swapping a Fan Tray ................................................................................2-31
Removing a Front Fan Tray ............................................................................2-31
Installing a New Front Fan Tray .....................................................................2-32
Removing the Back Fan Tray ..........................................................................2-33
Installing the New Back Fan Tray ...................................................................2-34
Chassis Airflow .............................................................................................................2-35
Power Supply Fans .................................................................................................2-37
Blank Cover Panels and Chassis Airflow ..............................................................2-38
Managing MAC Addresses on the Switch ....................................................................2-39
MAC Range Guidelines .........................................................................................2-39
OS8800 MAC Range Specifications ......................................................................2-40
VLAN Router Ports and MAC Address Allocation ...............................................2-41
Multiple MAC Router Mode ...........................................................................2-41
Enabling Single MAC Router Mode ...............................................................2-41
Viewing Current Multiple MAC Router Mode Status ....................................2-42
Chapter 3 Chassis Management Module (CMM) ...................................................................3-1
In This Chapter ................................................................................................................3-1
CMM Slot Locations .......................................................................................................3-2
CMM Front Panel ...........................................................................................................3-3
Ethernet Management Port .......................................................................................3-4
Access to the EMP .............................................................................................3-4
EMP Cable Requirements .................................................................................3-4
Console/Modem Port ................................................................................................3-5
Serial Connection to the Console/Modem Port .................................................3-5
Configuring X-ON/X-OFF Protocol ........................................................................3-7
Converting the Console Port to a Modem Port .................................................3-7
CMM Redundancy ..........................................................................................................3-9
CMM Failover Sequence .........................................................................................3-9
Synchronizing the Primary and Secondary CMMs ................................................3-10

Contents
OmniSwitch 8800 Hardware Users Guide December 2004 v
Hot Swapping CMMs ...................................................................................................3-12
Module Presence Signalling ............................................................................3-12
Hot Swap Requirements .........................................................................................3-12
Managing CMMs ..........................................................................................................3-13
Reloading a CMM ..................................................................................................3-13
Switching the Primary and Secondary Roles .........................................................3-14
Monitoring CMMs ........................................................................................................3-15
Front Panel LEDs ...................................................................................................3-15
Accessing General CMM Information ...................................................................3-15
CMM Hardware Information ..........................................................................3-15
Operating Status of CMM-Related Components ............................................3-16
CLI Commands Supported on Both the Primary and Secondary CMMs .......3-16
Chassis-Based MAC Address .......................................................................................3-17
Pinouts ...........................................................................................................................3-18
Chapter 4 Switch Fabric Module (SFM) .....................................................................................4-1
In This Chapter ................................................................................................................4-1
SFM Slot Locations .........................................................................................................4-2
SFM Front Panel .............................................................................................................4-3
SFM Redundancy ............................................................................................................4-4
SFM Failover Sequence ...........................................................................................4-4
Adding and Removing SFM Modules ............................................................................4-5
Using the Grounding Wrist Strap and Chassis Grounding Lug ...............................4-5
Module Slot Positions ..............................................................................................4-6
Adding a Module ......................................................................................................4-7
Removing a Module ...............................................................................................4-10
SFM Power Commands ................................................................................................4-13
Powering On an SFM .............................................................................................4-13
Powering Off an SFM ............................................................................................4-13
Setting an SFM to Standby .....................................................................................4-13
Monitoring SFM Modules .............................................................................................4-14
Front Panel LEDs ...................................................................................................4-14
Accessing General SFM Information .....................................................................4-15

Contents
vi OmniSwitch 8800 Hardware Users Guide December 2004
Chapter 5 Network Interface (NI) Modules ............................................................................5-1
In This Chapter ................................................................................................................5-1
ENI Modules ................................................................................................................... 5-3
Additional Features ..................................................................................................5-3
OS8-ENI-C24 Front Panel .......................................................................................5-4
GNI Modules ................................................................................................................... 5-6
OS8-GNI-C8 Front Panel .........................................................................................5-7
OS8-GNI-U8 Front Panel .........................................................................................5-9
OS8-GNI-U24/OS8-GNI2-U24 Front Panel ..........................................................5-11
MiniGBIC Specifications .......................................................................................5-13
Installing MiniGBIC Connectors ...........................................................................5-14
Removing MiniGBIC Connectors ..........................................................................5-15
OS8-GNI-C24/OS8-GNI2-C24 Front Panel ..........................................................5-16
10GNI Modules .............................................................................................................5-18
OS8-10GNI-UR1 Port Redundancy .......................................................................5-19
Unsupported Software Features .............................................................................5-19
OS8-10GNI-UR1 Front Panel ................................................................................5-20
Xenpak Specifications .........................................................................................5-22
Installing Xenpak Connectors ................................................................................5-23
Removing Xenpak Connectors ...............................................................................5-25
Smart Continuous Switching .........................................................................................5-26
Module Priorities During Boot Sequence ..............................................................5-26
Managing NI Modules ..................................................................................................5-26
Turning Power On or Off for a Specific NI Module .......................................5-26
Individual NI Reload .......................................................................................5-26
Monitoring NI Modules ................................................................................................5-27
Front Panel LEDs ............................................................................................5-27
Accessing General NI Information ..................................................................5-27
Hot Swapping NI Modules ............................................................................................5-28
Removing and Adding Modules ...................................................................................5-29
Using the Grounding Wrist Strap and Chassis Grounding Lug .............................5-29
Module Types and Slot Positions ...........................................................................5-30
Removing a Module ...............................................................................................5-30
Adding a Module ....................................................................................................5-32
Pinouts ...........................................................................................................................5-34
Handling Fiber and Fiber Optic Connectors .................................................................5-35

Contents
OmniSwitch 8800 Hardware Users Guide December 2004 vii
Appendix A Regulatory Compliance and Safety Information ..............................................A-1
Declaration of Conformity: CE Mark ............................................................................A-1
Standards Compliance ....................................................................................................A-2
FCC Class A, Part 15 ..............................................................................................A-3
Canada Class A Statement ......................................................................................A-3
JATE ........................................................................................................................A-3
CISPR22 Class A warning ......................................................................................A-3
VCCI .......................................................................................................................A-4
Class A Warning for Taiwan and Other Chinese Markets ......................................A-4
Translated Safety Warnings ...........................................................................................A-5
Chassis Lifting Warning ...................................................................................A-5
Blank Panels Warning ......................................................................................A-5
Electrical Storm Warning .................................................................................A-5
Installation Warning .........................................................................................A-6
Invisible Laser Radiation Warning ...................................................................A-6
Lithium Battery Warning .................................................................................A-7
Operating Voltage Warning .............................................................................A-7
Power Disconnection Warning .........................................................................A-8
Proper Earthing Requirement Warning ............................................................A-8
Read Important Safety Information Warning ...................................................A-9
Restricted Access Location Warning ...............................................................A-9
Wrist Strap Warning .......................................................................................A-10
Instrucciones de seguridad en español .........................................................................A-11
Advertencia sobre el levantamiento del chasis ...............................................A-11
Advertencia de las tapaderas en blanco ..........................................................A-11
Advertencia en caso de tormenta eléctrica .....................................................A-11
Advertencia de instalación .............................................................................A-11
Advertencia de radiación láser invisible .........................................................A-11
Advertencia de la batería de litio ....................................................................A-11
Advertencia sobre la tensión de operación .....................................................A-11
Advertencia sobre la desconexión de la fuente ..............................................A-11
Advertencia sobre una apropiada conexión a tierra .......................................A-12
Leer “información importante de seguridad” .................................................A-12
Advertencia de acceso restringido ..................................................................A-12
Advertencia de pulsera antiestática ................................................................A-12
Clase de seguridad ..........................................................................................A-12
Advertencia de fuentes de poder ....................................................................A-12
Index ...................................................................................................................... Index-1

Contents
viii OmniSwitch 8800 Hardware Users Guide December 2004

OmniSwitch 8800 Hardware Users Guide December 2004 page ix
About This Guide
This OmniSwitch 8800 Hardware Users Guide describes your switch hardware components and basic
switch hardware procedures.
Supported Platforms
This information in this guide applies to the following products:
•OmniSwitch 8800
The OmniSwitch 8800 includes 18 slots for high performance 10/100 Ethernet, 1 Gbps Gigabit Ethernet,
and 10 Gbps Gigabit NI modules.
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
•Omni Switch/Router
•OmniStack
•OmniAccess
Who Should Read this Manual?
The audience for this users guide is network administrators and IT support personnel who need to config-
ure, maintain, and monitor switches and routers in a live network. However, anyone wishing to gain
knowledge on the OmniSwitch 8800 hardware will benefit from the material in this guide.

When Should I Read this Manual? About This Guide
page x OmniSwitch 8800 Hardware Users Guide December 2004
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 8800 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
(chassis, cooling fans, power supplies, Network Interface modules, Switch Fabric Modules, Chassis
Management Modules) in greater depth.
What is in this Manual?
This users guide includes the following hardware-related information:
•Descriptions of “Availability” features.
•Technical specifications for chassis, power supplies, Network Interface (NI) modules, and Chassis
Management Modules (CMMs).
•Power supply requirements.
•The dynamics of chassis airflow, including detailed illustrations of proper and improper airflow config-
urations.
•Hot swapping power supplies, fan trays, Network Interface (NI) modules, and Chassis Management
Modules (CMMs).
•Installation and removal procedures for power supplies, fan trays, Network Interface (NI) modules,
Chassis Management Modules (CMMs), and Switch Fabric Modules (SFMs).
•Detailed illustrations and LED descriptions for power supplies, Network Interface (NI) modules, Chas-
sis Management Modules (CMMs), and Switch Fabric Modules (SFMs).
•CMM redundancy
•SFM redundancy
•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 infor-
mation on some CLI commands that pertain directly to hardware configuration, but it is not intended as a
software users guide. There are several OmniSwitch 8800 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.

About This Guide How is the Information Organized?
OmniSwitch 8800 Hardware Users Guide December 2004 page xi
How is the Information Organized?
Each chapter in this guide focuses on a specific hardware component, such as the Chassis Management
Module (CMM), or a set of hardware components. All descriptive, technical specification, and procedural
information for a hardware component can be found in the chapter dedicated to that component.
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 8800 Getting Started Guide
Release Notes
A hard-copy OmniSwitch 8800 Getting Started Guide is included with your switch; this guide provides all
the information you need to get your switch up and running the first time. This guide provides informa-
tion on unpacking the switch, rack mounting the switch, installing NI modules, unlocking access control,
setting the switch’s IP address, and setting up a password. It also includes succinct overview information
on fundamental aspects of the switch, such as hardware LEDs, the software directory structure, 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 8800 Hardware Users Guide
OmniSwitch 7700/7800/8800 Switch Management Guide
Once you have your switch up and running, you will want to begin investigating basic aspects of its hard-
ware and software. Information about switch hardware is provided in the OmniSwitch 8800 Hardware
Users Guide. This guide provide specifications, illustrations, and descriptions of all hardware compo-
nents, such as chassis, power supplies, Chassis Management Modules (CMMs), Switch Fabric Modules
(SFMs), Network Interface (NI) modules, and cooling fans. It also includes steps for common procedures,
such as removing and installing switch components.
The OmniSwitch 7700/7800/8800 Switch Management Guide is the primary users guide for the basic soft-
ware 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.

Documentation Roadmap About This Guide
page xii OmniSwitch 8800 Hardware Users Guide December 2004
Stage 3: Integrating the Switch Into a Network
Pertinent Documentation: OmniSwitch 7700/7800/8800 Network Configuration Guide
OmniSwitch 7700/7800/8800 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, Spanning Tree, and network routing
protocols. The OmniSwitch 7700/7800/8800 Network Configuration Guide contains overview informa-
tion, procedures, and examples on how standard networking technologies are configured in the
OmniSwitch 8800.
The OmniSwitch 7700/7800/8800 Advanced Routing Configuration Guide includes configuration informa-
tion for networks using advanced routing technologies (OSPF and BGP) and multicast routing protocols
(DVMRP and PIM-SM).
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.

About This Guide Related Documentation
OmniSwitch 8800 Hardware Users Guide December 2004 page xiii
Related Documentation
The following are the titles and descriptions of all the OmniSwitch 8800 user manuals:
•OmniSwitch 8800 Getting Started Guide
Describes the hardware and software procedures for getting an OmniSwitch 8800 up and running. Also
provides information on fundamental aspects of OmniSwitch software architecture.
•OmniSwitch 8800 Hardware Users Guide
Complete technical specifications and procedures for all OmniSwitch 8800 chassis, power supplies,
fans, Network Interface (NI) modules, and Switch Fabric Modules (SFMs).
•OmniSwitch CLI Reference Guide
Complete reference to all CLI commands supported on the OmniSwitch 8800. Includes syntax defini-
tions, default values, examples, usage guidelines, and CLI-to-MIB variable mappings.
•OmniSwitch 7700/7800/8800 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 7700/7800/8800 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 (routing protocols, such as RIP and IPX),
security options (authenticated VLANs), Quality of Service (QoS), link aggregation, and server load
balancing.
•OmniSwitch 7700/7800/8800 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), Open Shortest Path First (OSPF), and Border Gateway Protocol (BGP).
•Technical Tips, Field Notices
Includes information published by Alcatel’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.

User Manual CD About This Guide
page xiv OmniSwitch 8800 Hardware Users Guide December 2004
User Manual CD
All user guides for the OmniSwitch 8800 are included on the User Manual CD that accompanied your
switch. This CD also includes user guides for other Alcatel 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 PDF format and
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, de-select Fit to Page if it is selected in your
print dialog. Otherwise pages may print with slightly smaller margins.
Technical Support
An Alcatel 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 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’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’s technical
support, open a new case or access helpful release notes, technical bulletins, and manuals. For more infor-
mation on Alcatel’s Service Programs, see our web page at www.ind.alcatel.com, call us at 1-800-995-
2696, or email us at [email protected]el.com.

OmniSwitch 8800 Hardware Users Guide December 2004 page 1-1
1 The OmniSwitch 8800
The 18-slot OmniSwitch 8800 (OS8800) switch offers high performance 10/100 Ethernet and Gigabit
Ethernet capabilities, as well as embedded server load balancing for enterprise requirements. It provides
non-blocking Gigabit Ethernet connectivity, carrier-class availability, multi-layer security, and intelligent
switching and routing services—all at wire speed. Both half duplex and full duplex are supported on all
10/100 Ethernet ports; full duplex is supported on the Gigabit and 10 Gigabit Ethernet ports.
Switching Fabric
The 18-slot OS8800 offers up to 384 10/100 Ethernet ports, up to 128 wire-rate Gigabit Ethernet ports, up
to 384 high-density Gigabit Ethernet ports, and up to 16 redundant 10 Gigabit Ethernet ports. The OS8800
has a fabric capacity of 512 Gbps and throughput of 240 Mbps.
OmniSwitch 8800 Chassis
OS-GNI-C8
ACT
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OS-GNI-C8
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OS-GNI-C8
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OS8800-CMM
OK1
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PRI
SEC
TEMP
FAN
STATUS
CONSOLE
/MODEM
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LINK
ENET
OS-GNI-U8
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OK1
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OS-GNI-U8
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OK1
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OS-GNI-U8
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OS-ENI-C24
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OK1
OK2
24
OS8800-CMM
OK1
OK2
PRI
SEC
TEMP
FAN
STATUS
CONSOLE
/MODEM
1
2
3
ACT
LINK
ENET
OS-ENI-C24
1
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3
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Application Example The OmniSwitch 8800
page 1-2 OmniSwitch 8800 Hardware Users Guide December 2004
Application Example
The following application example shows one of the many ways OmniSwitch 8800 switches can be used
in an Enterprise network setting.
•Core Switch. In this example, an OS8800 is used as the core switch. Because the example network has
a high-speed 10 Gigabit Ethernet backbone, the Network Interface (NI) cards in the chassis will use 10
Gigabit Ethernet Network Interface (10GNI) modules. The core switch connects to OmniSwitch 7700
and OmniSwitch 6648 switches in wiring closets as well as the company server farm and an OmniPCX,
offering effective voice-data convergence.
OmniSwitch 6648
OmniSwitch 6648
OmniSwitch 6648
OmniSwitch 6648OmniSwitch 6648
OmniSwitch 6648
OmniSwitch 6648
OmniSwitch 6648
OmniSwitch 7700
TM
Wiring Closet 2
Wiring Closet 1 Wiring Closet 3
IP Phones
IP Phones IP Phones
Data
Workstations
Data
Wo r k s t a t i o ns
Data
Workstations
ServerServer
10 Gigabit
10/100
Gigabit
OmniSwitch 8800 Core/Backbone
OS8800 OS8800
OS6648 OS6648
OS7700
OmniPCX 4400

The OmniSwitch 8800 Availability Features
OmniSwitch 8800 Hardware Users Guide December 2004 page 1-3
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 fail-
ure. In addition, some Availability features allow you to maintain or replace hardware components with-
out powering off your switch or interrupting switch operations. Combined, these features provide added
resiliency and help ensure that your switch is consistently available for your day-to-day network opera-
tions.
Hardware-related Availability features include:
•Hardware Redundancy
•Smart Continuous Switching
•Software Rollback
•Hot Swapping
•Hardware Monitoring
•Power Checking Sequence
Information on software-related availability is provided in the OmniSwitch 7700/7800/8800 Switch
Management Guide and the OmniSwitch 7700/7800/8800 Network Configuration Guide. Refer to the
corresponding feature chapter (e.g., VRRP).
Hardware Redundancy
Hardware redundancy refers to backup hardware components. If primary hardware components fail or go
offline for any reason, the redundant hardware automatically assumes the primary hardware functions (this
is also referred to as failover). The following components offer redundancy:
•Chassis Management Modules (CMMs)
•Switch Fabric Modules (SFMs)
•Power Supplies
•Fan Units
•MAC EEPROM
Note. Redundancy is a key Availability feature; it is recommended that you install redundant hardware
components in your switch whenever possible.
For detailed information on CMM redundancy, refer to Chapter 3, “Chassis Management Module
(CMM).” For detailed information on SFM redundancy, refer to Chapter 4, “Switch Fabric Module
(SFM).” For information on power supply and fan redundancy, refer to Chapter 2, “Chassis and Power
Supplies.”

Availability Features The OmniSwitch 8800
page 1-4 OmniSwitch 8800 Hardware Users Guide December 2004
Smart Continuous Switching
In redundant CMM configurations, the switch provides support for NIs during failover. In other words, if
the primary CMM fails or goes offline for any reason, NI modules will continue data transmission and
routing functions during the secondary CMM’s takeover process. This Availability feature is referred to as
Smart Continuous Switching.
Incoming Layer 2 packets will continue to be sent to the appropriate egress port during failover. Known
routes will also be supported. (Note, however, that the NI cannot learn new routes without CMM support.
Any new route information will be ignored.) 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. Smart Continuous Switching is designed to maintain data flow only during CMM failover and is not
intended to support long-term data flow. If both the primary and secondary CMMs go offline or are
removed from the chassis, switch operations (including all NI support) will be disabled.
For more information on CMM redundancy and the failover process, refer to Chapter 3, “Chassis Manage-
ment Module (CMM).”
Software Rollback
Software rollback (also referred to as image rollback) essentially allows the switch to return to a prior “last
known good” version of software in the event of a system software problem. The CMM 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 Contents” chapter in the
OmniSwitch 7700/7800/8800 Switch Management Guide.

The OmniSwitch 8800 Availability Features
OmniSwitch 8800 Hardware Users Guide December 2004 page 1-5
Hot Swapping
Hot swapping refers to the action of adding, removing, or replacing certain hardware components without
powering off your switch and disrupting other components in the chassis. This feature greatly facilitates
hardware upgrades and maintenance and also allows you to easily replace components in the unlikely
event of hardware failure. The following hardware components can be hot swapped:
•Chassis Management Modules (CMMs)
•Ethernet Network Interface modules (ENIs)
•Gigabit Ethernet Network Interface modules (GNIs)
•10 Gigabit Ethernet Network Interface modules (10GNIs)
•Power supplies
•Fan tray
Hot Swapping Non-Redundant Management Modules and Power Supplies. If there is only one CMM
or power supply installed in the chassis and either of these components is removed or replaced, all switch
functions will be stopped until a replacement is installed.
Hot Swapping NI Modules. It is recommended that you hot swap NIs of the same type
(e.g., OS8-GNI-U8) whenever possible. Otherwise, the network configuration may be adversely affected.
For information on hot swapping CMMs, refer to Chapter 3, “Chassis Management Module (CMM).” For
information on hot swapping NI modules, refer to Chapter 5, “Network Interface (NI) Modules.” For
information on hot swapping power supplies and fan trays, refer to Chapter 2, “Chassis and Power
Supplies.”
Hardware Monitoring
Automatic Monitoring
Automatic monitoring refers to the switch’s built-in sensors that automatically monitor operations. The
majority of automatic monitoring is provided by the CMM. If an error is detected (e.g., over-threshold
temperature), the CMM 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 CMM displays
an amber TEMP LED in addition to sending a trap.)
LEDs
LEDs, which provide visual status information, are provided on the CMM, NI, SFM, and power supply
front panels. 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 the corresponding hardware
component chapter (e.g., “Network Interface (NI) Modules”).
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. Show commands for all features are described in detail in the OmniSwitch CLI Reference
Guide.

Availability Features The OmniSwitch 8800
page 1-6 OmniSwitch 8800 Hardware Users Guide December 2004
Power Checking Sequence
The power checking sequence is another built-in Availability feature. This feature helps regulate power in
the switch whenever the switch is booted or an NI module is installed in the chassis.
The sequence is a joint effort among the CMM, the SFMs, the NI modules, and the power supplies. During
the boot sequence, the primary CMM automatically compares the power consumption required by
installed NIs with the power available from the power supplies. If there is not adequate power to support
all NIs, the CMM will power on only the supported number of NIs, starting from the first NI slot position.
Important. During the power checking sequence, CMMs receive priority and are always powered on first.
SFMs are powered on next, then NI modules are powered on sequentially by slot position. In other words,
the NI in slot 1 is powered on, then slot 2, then slot 3, etc. For information on slot positions, refer to
Chapter 2, “Chassis and Power Supplies.”
Installing a New NI into a Running Chassis
When an NI module is installed in the chassis, only a small portion of the circuitry is initially powered up.
The CMM immediately reads the incoming module’s ID and determines how much power the module will
require. If the number of power supplies installed in the chassis can provide sufficient power, the CMM
turns on the incoming module. If the number of installed power supplies cannot provide sufficient power,
the incoming NI will remain powered off.