Configuring High Availability Features - Cisco Catalyst 2000 Configuration Handbook

Configuring High
Availability Features
See the following sections to configure and use these features:
■ 8-1: Route Processor Redundancy (RPR/RPR+): Supervisor Redundancy:
Discusses the steps needed to configure configuration redundancy and failover for a
Catalyst 6500 with redundant supervisor modules
8-2: Non-Stop Forwarding/Supervisor Switchover (NSF/SSO) with Supervisor
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Redundancy: Covers the steps to configure and tune non-stop forwarding and super-
visor switchover on a Catalyst 6500 with redundant supervisor modules
8-3: Router Redundancy with HSRP: Discusses the configuration steps required for
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Layer 3 switches to share a common IP address for gateway redundancy
8-4: Fast Software Upgrade (FSU) and Enhanced Fast Software Upgrade (eFSU):
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Discusses upgrading the software of supervisors when in redundancy mode
8-1: Route Processor Redundancy (RPR/RPR+)
Catalyst 6500 series switches support fault resistance by allowing a redundant
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Supervisor engine to take over if the primary Supervisor engine fails.
RPR supports a switchover time of two or more minutes.
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RPR+ decreases the switchover time by initializing the second processor and syn-
■
chronizing the configurations.
When the switch is powered on, RPR runs between the two Supervisor engines. The
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Supervisor engine that boots first becomes the RPR active Supervisor engine. The
Multilayer Switch Feature Card and Policy Feature Card become fully operational.
The route processor (RP) and PFC on the redundant Supervisor engine come out of
reset but are not operational.
Chapter 8