Which redundancy mode on Catalyst switches has the effect of the standby module reloading every other module and initializing all supervisor functions?
- RPR
- HSRP
- RPR+
- VRRP
- SSO
Explanation: Route Processor Redundancy (RPR) is a redundancy mode on Cisco Catalyst switches where the standby supervisor module is only partially booted and initialized. Because it is not fully ready to take over, when the active supervisor fails, the standby module must reload every other module in the chassis and then initialize all the supervisor functions from scratch. This process results in a significant delay during failover because the switch essentially performing a cold start for its line cards and internal processes. This is distinct from more advanced modes like RPR+, which does not reload other modules, or Stateful Switchover (SSO), which maintains Layer 2 information to ensure a near-seamless transition without link flapping.
Related exam: Modules 1 – 7: Checkpoint Exam: Network Switching Answers (CCNP ENCOR v9)
