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Chapter 24
Configuring NSF with SSO MSFC Redundancy
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Using the CLI to Configure NSF/SSO
These sections describe how to configure NSF/SSO:
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Standby supervisor engine/MSFC insertion—With NSF/SSO redundancy, you can hot swap the
standby supervisor engine/MSFC for maintenance. When you hot insert the standby MSFC, the
active MSFC detects the presence of the standby MSFC and starts to drive the standby MSFC state
transition to hot-standby. When you remove the standby MSFC, the synchronization between the
active and standby MSFC is stopped, any pending updates to the standby MSFC are discarded, and
the system enters simplex mode. The standby MSFC state is displayed by entering the show
redundancy states command.
Counters and statistics—The various counters and statistics that are maintained by the MSFC are
not synchronized between MSFCs.
Not all subsystems are high-availability aware and those that are high-availability aware may have
their own set of limitations.
Some subsystems have their own high availability-specific configurations and status commands
(such as the show isis nsf command).
MSFC software images do not currently support the in-service software upgrade (ISSU).
Diagnostics are not integrated into high availability. Switchovers due to failed diagnostics on the
MSFC are not supported.
Configuring SSO, page 24-6
Configuring CEF NSF, page 24-7
Verifying CEF NSF, page 24-7
Configuring BGP NSF, page 24-8
Verifying BGP NSF, page 24-8
Configuring OSPF NSF, page 24-9
Verifying OSPF NSF, page 24-10
Configuring IS-IS NSF, page 24-10
Verifying IS-IS NSF, page 24-11
Displaying Redundancy-Related Information, page 24-13
Performing an MSFC Switchover, page 24-13
Performing an MSFC Software Reload, page 24-13
Using Redundancy-Related Debug Commands, page 24-13
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
Using the CLI to Configure NSF/SSO
24-5
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