Availability Features; Software Rollback; Backup Power Supplies - Alcatel-Lucent OmniSwitch 6850 Series Hardware User's Manual

OmniSwitch 6850 Series

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 6850 Series
switches to return to a prior "last known good" version of software in the event of a system software prob-
lem. The switch controls software rollback through its resilient directory structure design (i.e., /flash/
working and /flash/certified).
For detailed information on the software rollback feature, as well as the switch's /flash/working and
/flash/certified directories, refer to the "Managing CMM Directory Content" chapter in the OmniSwitch
6800/6850/9000 Series Switch Management Guide.
Backup Power Supplies
The OmniSwitch 6850 Series switches support an optional backup power supply. This power supply is
connected to the rear of the unit. 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. It can hold 510W or 360W power supply or in case of
non-PoE product switches 120W or 126W power supply. This provides redundant chassis power on a 1:1
basis.
Backup power supplies operate in active standby mode. If the primary power supply fails unexpectedly,
the backup power supply automatically takes up the full power load without disrupting the switch.
Note. For more information on backup power supplies, refer to
Chassis and Hardware Components."
OmniSwitch 6850 Series Hardware Users Guide
Chapter 2, "OmniSwitch 6850 Series
August 2007
Availability Features
page 1-3