Route Processor Redundancy Plus for the Cisco 12000 Series Internet Router

When two route processors (RPs) are installed in a Cisco 12000 series Internet Router chassis, one RP

acts as the active RP, and the other acts as a backup, or standby, RP. If the active RP fails, or is removed

from the system, the standby RP detects the failure and initiates a switchover. During a switchover, the

standby RP assumes control of the router, connects with the network interfaces, and activates the local

network management interface and system console. Route Processor Redundancy Plus for the Cisco 12000 Series Internet Router

When two route processors (RPs) are installed in a Cisco 12000 series Internet Router chassis, one RP

acts as the active RP, and the other acts as a backup, or standby, RP. If the active RP fails, or is removed

from the system, the standby RP detects the failure and initiates a switchover. During a switchover, the

standby RP assumes control of the router, connects with the network interfaces, and activates the local

network management interface and system console.

Using the RPR+ feature, the standby RP is fully initialized and configured. This allows RPR+ to dramatically shorten the switchover time if the active RP fails, or if a manual switchover is performed.

Because both the startup config and running config are continually synchronized from the active to the

standby RP, line cards are not reset during a switchover. The interfaces remain up during this transfer,

so neighboring routers do not detect a link flap (that is, the link does not go down and back up).

Note.RPR+ features are not supported when using a Gigabit Route Processor (GRP) and a Performance Route

Processor (PRP). You must use the same cards in the chassis in order to use RPR+ features.

Using the RPR+ feature, the standby RP is fully initialized and configured. This allows RPR+ to dramatically shorten the switchover time if the active RP fails, or if a manual switchover is performed.

Because both the startup config and running config are continually synchronized from the active to the

standby RP, line cards are not reset during a switchover. The interfaces remain up during this transfer,

so neighboring routers do not detect a link flap (that is, the link does not go down and back up).

Note.RPR+ features are not supported when using a Gigabit Route Processor (GRP) and a Performance Route

Processor (PRP). You must use the same cards in the chassis in order to use RPR+ features.