OmniSwitch 6450 Switches OmniSwitch 6450 Feature Overview
OmniSwitch 6450 Hardware Users Guide September 2015 page 1-5
Availability Features
OmniSwitch 6450 switches incorporate advanced Alcatel-Lucent Operating System (AOS) protocols to
ensure high availability for mission critical applications. 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 high-impact
network operations.
Hardware-related availability features include:
• Software Rollback
• Hot Swapping
• Hardware Monitoring
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 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
6250/6450 Switch Management Guide.
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 components can be hot swapped:
• Switches (virtual NI modules) within a virtual chassis stack. Refer to “Hot-Swapping Modules In a
Stack” on page 7-25 for more information.
• 1G uplink modules (“like” kinds only). Refer to “Swapping Expansion Modules” on page 7-3 for
more information.
• 10G stacking modules (“like” kinds only). Refer to “Swapping Expansion Modules” on page 7-3 for
more information.
• Power supply connector cables
• Transceivers. Refer to OmniSwitch 6250/6450 Transceivers Guide for more information.
• Backup power supplies
Note. Backup power supplies are fully operational and may share the load with the primary power supply,
remaining operational in the event the primary power supply fails unexpectedly. If a failover occurs, the
backup power supply automatically takes up the full power load without disrupting the switch.
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