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Catalyst 6500 Series Switch Command Reference—Release 7.6
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Chapter 2 Catalyst 6500 Series Switch and ROM Monitor Commands
set system highavailability
set system highavailability
To enable or disable high system availability for the switch, use the set system highavailability
command.
set system highavailability {enable | disable}
Syntax Description
Defaults The default is disabled.
Command Types Switch command.
Command Modes Privileged.
Usage Guidelines High availability provides Layer 2 and Layer 3 protocol redundancy.
If you enable high availability while the redundant supervisor engine is running, the switch checks the
version compatibility between the two supervisor engines. If the versions are compatible, database
synchronization occurs. When you disable high availability, database synchronization does not occur
and protocols restart on the redundant supervisor engine after switchover.
If you disable high availability from the enabled state, synchronization from the active supervisor engine
is stopped. On the redundant supervisor engine, current synchronization data is discarded. If you enable
high availability from the disabled state, synchronization from the active supervisor engine to the
redundant supervisor engine starts (if you have a redundant supervisor engine and its image version is
compatible with the active supervisor engine).
Examples This example shows how to enable high availability:
Console> (enable) set system highavailability enable
System high availability enabled.
Console> (enable)
This example shows how to disable high availability:
Console> (enable) set system highavailability disable
System high availability disabled.
Console> (enable)
Related Commands set system highavailability versioning
show system highavailability
enable Activates system high availability.
disable Deactivates system high availability.