Alcatel OS6850-P48 User manual

Part No. 060209-10, Rev. K
June 2011
OmniSwitch 6850/6850E
Series Hardware Users Guide
www.alcatel-lucent.com

ii OmniSwitch 6850/6850E Series Hardware Users Guide June 2011
This user guide documents OmniSwitch 6850/6850E Series hardware, including
chassis and associated components.
The specifications described in this guide are subject to change without notice.
Copyright © 2011 by Alcatel-Lucent. All rights reserved. This document may not be reproduced in whole
or in part without the express written permission of Alcatel-Lucent.
Alcatel-Lucent®and the Alcatel-Lucent logo are registered trademarks of Alcatel-Lucent. Xylan®,
OmniSwitch®, OmniStack®, and Alcatel-Lucent OmniVista®are registered trademarks of Alcatel-Lucent.
OmniAccess™, Omni Switch/Router™, PolicyView™, RouterView™, SwitchManager™, VoiceView™,
WebView™, X-Cell™, X-Vision™, and the Xylan logo are trademarks of Alcatel-Lucent.
This OmniSwitch product contains components which may be covered by one or more of the following
U.S. Patents:
•U.S. Patent No. 6,339,830
•U.S. Patent No. 6,070,243
•U.S. Patent No. 6,061,368
•U.S. Patent No. 5,394,402
•U.S. Patent No. 6,047,024
•U.S. Patent No. 6,314,106
•U.S. Patent No. 6,542,507
•U.S. Patent No. 6,874,090
26801 West Agoura Road
Calabasas, CA 91301
[phone] FAX [phone]
[email protected]
US Customer Support—[phone]
International Customer Support—[phone]
Internet—service.esd.alcatel-lucent.com

OmniSwitch 6850/6850E Series Hardware Users Guide June 2011 iii
Contents
Contents About This Guide ..........................................................................................................ix
Supported Platforms ..........................................................................................................ix
Who Should Read this Manual? ........................................................................................xi
When Should I Read this Manual? ....................................................................................xi
What is in this Manual? .....................................................................................................xi
What is Not in this Manual? ..............................................................................................xi
How is the Information Organized? .................................................................................xii
Documentation Roadmap .................................................................................................xii
Related Documentation ...................................................................................................xiv
Published / Latest Product Documentation ......................................................................xv
Technical Support ............................................................................................................ xv
Chapter 1 OmniSwitch 6850/6850E Series .............................................................................1-1
Availability Features .......................................................................................................1-2
Software Rollback ....................................................................................................1-2
Backup Power Supplies ............................................................................................1-2
Hot Swapping ...........................................................................................................1-3
Hardware Monitoring ...............................................................................................1-3
Chapter 2 OmniSwitch 6850 Series Chassis and Hardware Components .....................2-1
OmniSwitch 6850-24L ....................................................................................................2-3
OmniSwitch 6850-48L ....................................................................................................2-7
OmniSwitch 6850-P24L ................................................................................................2-10
OmniSwitch 6850-P48L ................................................................................................2-14
OmniSwitch 6850-U24X ..............................................................................................2-18
OmniSwitch 6850-24 ....................................................................................................2-22
OmniSwitch 6850-48 ....................................................................................................2-26
OmniSwitch 6850-24X .................................................................................................2-30
OmniSwitch 6850-48X .................................................................................................2-34
OmniSwitch 6850-P24 ..................................................................................................2-37
OmniSwitch 6850-P48 ..................................................................................................2-41
OmniSwitch 6850-P24X ...............................................................................................2-45
OmniSwitch 6850-P48X ...............................................................................................2-49
Status LEDs ...................................................................................................................2-53

Contents
iv OmniSwitch 6850/6850E Series Hardware Users Guide June 2011
10/100/1000 LEDs .................................................................................................2-54
100/1000 SFP LEDs ...............................................................................................2-54
10000 XFP1 LEDs .................................................................................................2-54
10000 XFP2 LEDs .................................................................................................2-54
Rear Panel .....................................................................................................................2-55
Mounting the Switch .....................................................................................................2-56
Airflow Considerations ..........................................................................................2-56
Chassis Airflow ...............................................................................................2-57
Blank Cover Panels ................................................................................................2-58
Installation Options ................................................................................................2-59
Installing the Switch on a Tabletop or Bench .................................................2-59
Rack-Mounting the Switch ..............................................................................2-60
Installing and Removing Combo Port SFPs ...........................................................2-61
Setting Up a Stacked Configuration ..............................................................................2-62
Rack Mounting Stacked Configurations ................................................................2-62
Cabling Stacked Configurations .............................................................................2-62
Redundant Stacking Cable Connections .........................................................2-62
Supported Cabling Patterns .............................................................................2-62
Booting OmniSwitch 6850 Series Switches .................................................................2-65
Booting a Stand-Alone Switch ...............................................................................2-65
Booting Stacked Configurations ............................................................................2-66
Power Cords ..................................................................................................................2-67
Specifications .........................................................................................................2-67
Console Port ..................................................................................................................2-68
Serial Connection Default Settings ........................................................................2-68
Modifying the Serial Connection Settings .............................................................2-68
Console Port Pinouts ..............................................................................................2-70
10/100 Ethernet Port – RJ-45 Pinout (non-PoE) .............................................2-70
Gigabit Ethernet Port – RJ-45 Pinout ..............................................................2-70
10/100/1000 Mbps Power over Ethernet Port – RJ-45 Pinout .......................2-70
RJ-45 Console Port – Connector Pinout ..........................................................2-71
Chapter 3 OmniSwitch 6850E Series Chassis and Hardware Components ...................3-1
OmniSwitch 6850/6850E Series Switches ...............................................................3-1
OmniSwitch 6850E-24 .............................................................................................3-2
OmniSwitch 6850E-24 Rear Panel ....................................................................3-3
OS6850E-24 Specifications ...............................................................................3-4
OmniSwitch 6850E-P24 ...........................................................................................3-5
OmniSwitch 6850E-P24 Rear Panel .................................................................3-6
OS6850E-P24 Specifications ............................................................................3-7
OmniSwitch 6850E-24X ..........................................................................................3-8
OmniSwitch 6850E-24X Rear Panel .................................................................3-9
OS6850E-24X Specifications ..........................................................................3-10
OmniSwitch 6850E-P24X ......................................................................................3-11
OmniSwitch 6850E-P24X Rear Panel .............................................................3-12
OS6850E-P24X Specifications .......................................................................3-13
OmniSwitch 6850E-48 ...........................................................................................3-14
OmniSwitch 6850E-48 Rear Panel ..................................................................3-15
OS6850E-48 Specifications .............................................................................3-16

Contents
OmniSwitch 6850/6850E Series Hardware Users Guide June 2011 v
OmniSwitch 6850E-P48 .........................................................................................3-17
OmniSwitch 6850E-P48 Rear Panel ...............................................................3-18
OS6850E-P48 Specifications ..........................................................................3-19
OmniSwitch 6850E-48X ........................................................................................3-20
OmniSwitch 6850E-48X Rear Panel ...............................................................3-21
OS6850E-48X Specifications ..........................................................................3-22
OmniSwitch 6850E-P48X ......................................................................................3-23
OmniSwitch 6850E-P48X Rear Panel .............................................................3-24
OS6850E-P48X Specifications .......................................................................3-25
OmniSwitch 6850E-U24X .....................................................................................3-26
OmniSwitch 6850E-U24X Rear Panel ............................................................3-27
OS6850E-U24X Specifications .......................................................................3-28
OS6-XNI-U2 Module .............................................................................................3-29
OmniSwitch 6850E Port Numbering ....................................................................3-30
OmniSwitch 6850E LED Status Indicators ...................................................................3-31
Console Port ..................................................................................................................3-32
Serial Connection Default Settings ........................................................................3-32
Modifying the Serial Connection Settings .............................................................3-32
Port Pinouts ............................................................................................................3-34
10/100 Ethernet Port – RJ-45 Pinout (non-PoE) .............................................3-34
Gigabit Ethernet Port – RJ-45 Pinout ..............................................................3-34
10/100/1000 Mbps Power over Ethernet Port – RJ-45 Pinout .......................3-34
RJ-45 Console Port – Connector Pinout ..........................................................3-35
Chapter 4 OmniSwitch 6850/6850E Series Power Supplies ...............................................4-1
OmniSwitch 6850/6850E Series Power Supplies ...........................................................4-2
Power Supply Shelf ..................................................................................................4-3
PS-900AC-P Power Supply .....................................................................................4-4
PS-510W-AC Power Supply ....................................................................................4-5
PS-510W-AC-E Power Supply ................................................................................4-6
PS-360W-AC Power Supply ....................................................................................4-7
PS-360W-AC-E Power Supply ................................................................................4-8
PS-126W-AC Power Supply ....................................................................................4-9
PS-120W-DC Power Supply ..................................................................................4-10
Installing Power Supplies .......................................................................................4-11
Connecting a Power Supply Directly to the Chassis .......................................4-11
Connecting a Power Supply with a Cable .......................................................4-12
DC Power Supply Considerations ...................................................................4-16
Connecting a DC Power Source .............................................................................4-17
Installing DC Power Source Wire Leads .........................................................4-18
Viewing the Power Supply Status ...................................................................4-20
Monitoring the Chassis .................................................................................................4-21
Checking the Overall Chassis Status ......................................................................4-21
Checking the Temperature Status ..........................................................................4-21
Checking the Fan Status .........................................................................................4-22
Checking the Power Supply Status ........................................................................4-22
Additional Monitoring Commands ........................................................................4-22

Contents
vi OmniSwitch 6850/6850E Series Hardware Users Guide June 2011
Chapter 5 Managing Power over Ethernet (PoE) .................................................................5-1
In This Chapter ................................................................................................................5-2
Power over Ethernet Specifications ................................................................................5-3
Viewing PoE Power Supply Status .................................................................................5-4
Configuring Power over Ethernet Parameters .................................................................5-5
Power over Ethernet Defaults ..................................................................................5-5
Understanding and Modifying the Default Settings .................................................5-5
PoE Class Detection .................................................................................................5-5
Setting the PoE Operational Status ....................................................................5-6
Configuring the Total Power Available to a Port ..............................................5-6
Configuring the Total Power Available to a slot ...............................................5-7
Setting Port Priority Levels ...............................................................................5-7
Setting the Capacitor Detection Method ...........................................................5-8
Understanding Priority Disconnect .................................................................................5-9
Setting Priority Disconnect Status ............................................................................5-9
Disabling Priority Disconnect ...........................................................................5-9
Enabling Priority Disconnect ............................................................................5-9
Priority Disconnect is Enabled; Same Priority Level on All PD .....................5-10
Priority Disconnect is Enabled;
Incoming PD Port has Highest Priority Level .................................................5-10
Priority Disconnect is Enabled;
Incoming PD Port has Lowest Priority Level ..................................................5-10
Priority Disconnect is Disabled .......................................................................5-11
Monitoring Power over Ethernet via CLI .....................................................................5-12
Chapter 6 Managing OmniSwitch 6850/6850E Series Stacks ...........................................6-1
In This Chapter ................................................................................................................6-2
OmniSwitch 6850/6850E Series Stacking Specifications ...............................................6-3
Changing OS6850E Chassis Mode ..........................................................................6-3
Changing OS6850E Daughter Module Mode ..........................................................6-3
OmniSwitch 6850/6850E Series Stack Overview ...........................................................6-5
Roles Within the Stack ....................................................................................................6-5
Primary and Secondary Management Modules .......................................................6-5
Primary Management Module Selection ...........................................................6-8
Secondary Management Module Selection .....................................................6-11
Idle Module Role ....................................................................................................6-13
Pass-Through Mode ...............................................................................................6-14
Recovering from Pass-Through Mode (Duplicate Slot Numbers) ..................6-15
Stack Cabling ................................................................................................................6-18
Redundant Stacking Cable Connection ..................................................................6-19
Checking Redundant Stacking Cable Status ..........................................................6-21
Slot Numbering .............................................................................................................6-22
Dynamic Slot Number Assignment ........................................................................6-23
Manual Slot Number Assignment ..........................................................................6-25
Reverting to the Dynamic Slot Numbering Model ..........................................6-26

Contents
OmniSwitch 6850/6850E Series Hardware Users Guide June 2011 vii
Hot-Swapping Modules In a Stack ...............................................................................6-27
Removing Switches from an Existing Stack ..........................................................6-27
Inserting Switches Into an Existing Stack ..............................................................6-27
Merging Stacks .......................................................................................................6-28
Reloading Switches .......................................................................................................6-29
Reloading the Primary Management Module ........................................................6-29
Reloading the Secondary Management Module ....................................................6-31
Reloading Switches with Idle Roles .......................................................................6-33
Reloading Switches in Pass-Through Mode ..........................................................6-33
Reloading All Switches in a Stack .........................................................................6-34
Software Synchronization During a Full Reload .............................................6-34
Effects of Saved Slot Number Information on the Reload Process .................6-34
Avoiding Split Stacks .............................................................................................6-36
Changing the Secondary Module to Primary ................................................................6-37
Synchronizing Switches in a Stack ...............................................................................6-39
Automatic Synchronization During a Full Reload .................................................6-39
Monitoring the Stack .....................................................................................................6-40
Visually Monitoring the Stack ...............................................................................6-40
Appendix A Regulatory Compliance and Safety Information ..............................................A-1
Declaration of Conformity: CE Mark ............................................................................A-1
Waste Electrical and Electronic Equipment (WEEE) Statement ............................A-1
China RoHS: Hazardous Substance Table .....................................................................A-2
Standards Compliance ....................................................................................................A-4
FCC Class A, Part 15 ..............................................................................................A-5
Canada Class A Statement ......................................................................................A-5
JATE ........................................................................................................................A-5
CISPR22 Class A warning ......................................................................................A-6
VCCI .......................................................................................................................A-6
Class A Warning for Taiwan and Other Chinese Markets ......................................A-6
Translated Safety Warnings ...........................................................................................A-7
Chassis Lifting Warning ...................................................................................A-7
Blank Panels Warning ......................................................................................A-7
Electrical Storm Warning .................................................................................A-7
Installation Warning .........................................................................................A-8
Invisible Laser Radiation Warning ...................................................................A-8
Operating Voltage Warning .............................................................................A-8
Power Disconnection Warning .........................................................................A-9
Proper Earthing Requirement Warning ............................................................A-9
DC Power Supply Connection Warning ......................................................................A-10
Read Important Safety Information Warning .................................................A-10
Restricted Access Location Warning .............................................................A-10
Wrist Strap Warning .......................................................................................A-11
Instrucciones de seguridad en español .........................................................................A-12
Advertencia sobre el levantamiento del chasis ...............................................A-12
Advertencia de las tapaderas en blanco ..........................................................A-12
Advertencia en caso de tormenta eléctrica .....................................................A-12

Contents
viii OmniSwitch 6850/6850E Series Hardware Users Guide June 2011
Advertencia de instalación .............................................................................A-12
Advertencia de radiación láser invisible .........................................................A-12
Advertencia de la batería de litio ....................................................................A-12
Advertencia sobre la tensión de operación .....................................................A-12
Advertencia sobre la desconexión de la fuente ..............................................A-12
Advertencia sobre una apropiada conexión a tierra .......................................A-13
Leer “información importante de seguridad” .................................................A-13
Advertencia de acceso restringido ..................................................................A-13
Advertencia de pulsera antiestática ................................................................A-13
Clase de seguridad ..........................................................................................A-13
Advertencia de fuentes de poder ....................................................................A-13
Index .................................................................................................................................. Index-1

OmniSwitch 6850/6850E Series Hardware Users Guide June 2011 page ix
About This Guide
This OmniSwitch 6850/6850E Series 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 6850-24/24L/P24/P24L/24X/P24X
•OmniSwitch 6850-48/48L/P48/P48L/48X/P48X
•OmniSwitch 6850-U24X
•OmniSwitch 6850E-24/P24/24X/P24X
•OmniSwitch 6850E-48/P48/48X/P48X
•OmniSwitch 6850E-U24X

Supported Platforms About This Guide
page x OmniSwitch 6850/6850E Series Hardware Users Guide June 2011
Unsupported Platforms
The information in this guide does not apply to the following products:
•OmniSwitch (original version with no numeric model name)
•OmniSwitch 6600 Family
•OmniSwitch 6800 Series
•OmniSwitch 7700
•OmniSwitch 7800
•OmniSwitch 8800
•OmniSwitch 9000 Series
•OmniStack
•OmniAccess

About This Guide Who Should Read this Manual?
OmniSwitch 6850/6850E Series Hardware Users Guide June 2011 page xi
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 6850/6850E Series hardware will benefit from the material in this guide.
When Should I Read this Manual?
Read this guide as soon as you are ready to familiarize yourself with your switch hardware components.
You should have already stepped through the first login procedures and read the brief hardware overviews
in the OmniSwitch 6850/6850E Series Getting Started Guide.
You should already be familiar with the very basics of the switch hardware, such as module LEDs and
module installation procedures. This manual will help you understand your switch hardware components
(e.g., chassis, stacking and cables, backup power supplies, etc.) in greater depth.
What is in this Manual?
This users guide includes the following hardware-related information:
•Descriptions of stand-alone and stacked configurations.
•Descriptions of “availability” features.
•Descriptions of chassis types (e.g., the OS6850-P48X).
•Instructions for mounting the chassis.
•Descriptions of hardware components (status LEDs, chassis, stacking and cables, backup power
supplies, etc.).
•Managing a stand-alone chassis.
•Setting up stacks.
•Managing stacks.
•Hardware-related Command Line Interface (CLI) commands
What is Not in this Manual?
The descriptive and procedural information in this manual focuses on switch hardware. It includes 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 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 -xii and “Related Documentation” on
page -xiv for further information on software configuration guides available for your switch.

How is the Information Organized? About This Guide
page xii OmniSwitch 6850/6850E Series Hardware Users Guide June 2011
How is the Information Organized?
This users guide provides an overview of OmniSwitch 6850/6850E Series switches, an overview and
procedures for setting up and managing the switches, an overview and procedures for managing Power
over Ethernet (PoE), and an overview and procedures for managing stacks.
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 6850/6850E Series Getting Started Guide
Release Notes
The OmniSwitch 6850/6850E Series Getting Started Guide provides all the information you need to get
your switch up and running the first time. This guide provides information on unpacking the switch, rack
mounting the switch, installing stacking cables, installing backup power supplies, unlocking access
control, setting the switch’s IP address, setting up a password, and setting up stacks. It also includes
succinct overview information on fundamental aspects of the switch, such as hardware LEDs, the soft-
ware directory structure, stacking, CLI conventions, and web-based management.
At this time you should also familiarize yourself with the Release Notes that accompanied your switch.
This document includes important information on feature limitations that are not included in other user
guides.
Stage 2: Gaining Familiarity with Basic Switch Functions
Pertinent Documentation: OmniSwitch 6850/6850E Series Hardware Users Guide
OmniSwitch AOS Release 6 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 6850/6850E Series
Hardware Users Guide. This guide provide specifications, illustrations, and descriptions of all hardware
components—e.g., chassis, stacking and stacking cables, backup power supplies, etc. It also includes steps
for common procedures, such as removing and installing switch modules.
The OmniSwitch AOS Release 6 Switch Management Guide is the primary user 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.

About This Guide Documentation Roadmap
OmniSwitch 6850/6850E Series Hardware Users Guide June 2011 page xiii
Stage 3: Integrating the Switch Into a Network
Pertinent Documentation: OmniSwitch AOS Release 6 Network Configuration Guide
OmniSwitch AOS Release 6 Advanced Routing Configuration Guide
When you are ready to connect your switch to the network, you will need to learn how the OmniSwitch
implements fundamental software features, such as 802.1Q, VLANs, and Spanning Tree. The OmniSwitch
AOS Release 6 Network Configuration Guide contains overview information, procedures and examples on
how standard networking technologies are configured on the OmniSwitch.
The OmniSwitch AOS Release 6 Advanced Routing Configuration Guide includes configuration informa-
tion for networks using Open Shortest Path First (OSPF).
Anytime
The OmniSwitch CLI Reference Guide contains comprehensive information on all CLI commands
supported by the switch. This guide includes syntax, default, usage, example, related CLI command, and
CLI-to-MIB variable mapping information for all CLI commands supported by the switch. This guide can
be consulted anytime during the configuration process to find detailed and specific information on each
CLI command.

Related Documentation About This Guide
page xiv OmniSwitch 6850/6850E Series Hardware Users Guide June 2011
Related Documentation
The following are the titles and descriptions of all the OmniSwitch 6850/6850E Series user manuals:
•OmniSwitch 6850/6850E Series Getting Started Guide
Describes the hardware and software procedures for getting an OmniSwitch 6850 Series switch up and
running. Also provides information on fundamental aspects of OmniSwitch software and stacking
architecture.
•OmniSwitch 6850/6850E Series Hardware Users Guide
Detailed technical specifications and procedures for the OmniSwitch 6850 Series chassis and compo-
nents. This manual also includes comprehensive information on assembling and managing stacked
configurations.
•OmniSwitch CLI Reference Guide
Complete reference to all CLI commands supported on the OmniSwitch. Includes syntax definitions,
default values, examples, usage guidelines and CLI-to-MIB variable mappings.
•OmniSwitch AOS Release 6 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 AOS Release 6 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), security
options (authenticated VLANs), Quality of Service (QoS), and link aggregation.
•OmniSwitch AOS Release 6 Advanced Routing Configuration Guide
Includes network configuration procedures and descriptive information on all the software features and
protocols included in the advanced routing software package. Chapters cover multicast routing
(DVMRP and PIM-SM), and OSPF.
•OmniSwitch Transceivers Guide
Includes SFP and XFP transceiver specifications and product compatibility information.
•Technical Tips, Field Notices
Includes information published by Alcatel-Lucent’s Customer Support group.
•Release Notes
Includes critical Open Problem Re, feature exceptions, and other important information on the features
supported in the current release and any limitations to their support.

About This Guide Published / Latest Product Documentation
OmniSwitch 6850/6850E Series Hardware Users Guide June 2011 page xv
Published / Latest Product Documentation
All user guides are included on the Alcatel-Lucent public website. This website also includes user guides
for other Alcatel-Lucent Enterprise products.
The latest user guides can be found on our website at:
http://enterprise.alcatel-lucent.com/?dept=UserGuides&page=Portal
Technical Support
An Alcatel-Lucent service agreement brings your company the assurance of 7x24 no-excuses technical
support. You’ll also receive regular software updates to maintain and maximize your Alcatel-Lucent prod-
uct’s features and functionality and on-site hardware replacement through our global network of highly
qualified service delivery partners. Additionally, with 24-hour-a-day access to Alcatel-Lucent’s Service
and Support web page, you’ll be able to view and update any case (open or closed) that you have reported
to Alcatel-Lucent’s technical support, open a new case or access helpful release notes, technical bulletins,
and manuals. For more information on Alcatel-Lucent’s Service Programs, see our web page at
service.esd.alcatel-lucent.com, call us at 1-800-995-2696, or email us at esd.[email protected].

Technical Support About This Guide
page xvi OmniSwitch 6850/6850E Series Hardware Users Guide June 2011

OmniSwitch 6850/6850E Series Hardware Users Guide June 2011 page 1-1
1 OmniSwitch 6850/6850E
Series
The OmniSwitch 6850/6850E Series are an advanced fixed configuration family of stackable Ethernet
switches. These switches provide wire rate layer-2 forwarding and layer-3 routing with advanced services,
effective availability, resiliency, and security features and are ideal for the following network applications:
•Enterprise workgroups/LAN wiring closets
•Edge deployments and branch offices
•L3 aggregation/distribution layer switches in three-tier networks
•Small enterprise core switching
•Quality of service (QoS) for mission critical applications
•Data center server clusters

Availability Features OmniSwitch 6850/6850E Series
page 1-2 OmniSwitch 6850/6850E Series Hardware Users Guide June 2011
Availability Features
The switch provides a broad variety of availability features. Availability features are hardware and
software-based safeguards that help to prevent the loss of data flow in the unlikely event of a subsystem
failure. In addition, some availability features allow users to maintain or replace hardware components
without powering off the switch or interrupting switch operations. Combined, these features provide added
resiliency and help to ensure that the switch or virtual chassis is consistently available for day-to-day
network operations.
Hardware-related availability features include:
•Software Rollback
•Backup Power Supplies
•Hot Swapping
•Hardware Monitoring
Software Rollback
Software rollback (also referred to as image rollback) essentially allows the OmniSwitch to return to a
prior “last known good” version of software in the event of a system software problem. The switch
controls software rollback through its resilient directory structure design (i.e., /flash/working and /flash/
certified).
For detailed information on the software rollback feature, as well as the switch’s /flash/working and
/flash/certified directories, refer to the “Managing CMM Directory Content” chapter in the OmniSwitch
AOS Release 6 Series Switch Management Guide.
Backup Power Supplies
The switches support an optional backup power supply. This power supply is connected to the rear of the
unit and provides redundant chassis power on a 1:1 basis. There is a power shelf provided with the unit
that slides into the rear of the chassis and is used to hold the power supplies.
Backup power supplies operate in active standby mode. If the primary power supply fails unexpectedly,
the backup power supply automatically takes up the full power load without disrupting the switch.

OmniSwitch 6850/6850E Series Availability Features
OmniSwitch 6850/6850E Series Hardware Users Guide June 2011 page 1-3
Hot Swapping
Hot swapping refers to the action of adding, removing, or replacing components without powering off
switches or disrupting other components.This feature facilitates hardware upgrades and maintenance and
allows users to easily replace components in the unlikely event of hardware failure.
The following hardware components can be hot swapped:
•Backup power supply
•Backup power supply connector cables
•SFPs
For instructions on hot swapping backup power supplies, refer to Chapter 2, “OmniSwitch 6850 Series
Chassis and Hardware Components.”.
Hardware Monitoring
Automatic Monitoring
Automatic monitoring refers to the switch’s built-in sensors that automatically monitor operations. If an
error is detected (e.g., over-threshold temperature), the switch immediately sends a trap to the user. The
trap is displayed on the console in the form of a text error message. (In the case of an over-threshold
temperature condition, the chassis displays an amber TMP LED in addition to sending a trap.)
LEDs
LEDs, which provide visual status information, are provided on the chassis front panel. LEDs are used to
indicate conditions such as hardware and software status, temperature errors, link integrity, data flow, etc.
For detailed LED descriptions, refer to Chapter 2, “OmniSwitch 6850 Series Chassis and Hardware
Components.”
User-Driven Monitoring
User-driven hardware monitoring refers to CLI commands that are entered by the user in order to access
the current status of hardware components. The user enters “show” commands that output information to
the console. Monitoring information for chassis components, such as the optional back up power supply,
chassis temperature sensor, and chassis fans is provided in Chapter 2, “OmniSwitch 6850 Series Chassis
and Hardware Components.” The show commands for all the features are described in detail in the
OmniSwitch CLI Reference Guide.

Availability Features OmniSwitch 6850/6850E Series
page 1-4 OmniSwitch 6850/6850E Series Hardware Users Guide June 2011