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Nonstop Active Routing

Nonstop active routing (NSR) enables a routing platform with redundant Routing Engines to switch from a primary Routing Engine to a backup Routing Engine without alerting peer nodes that a change has occurred. Nonstop active routing uses the same infrastructure as graceful Routing Engine switchover to preserve interface and kernel information. However, nonstop active routing also preserves routing information and protocol sessions by running the routing protocol process (rpd) on both Routing Engines. In addition, nonstop active routing preserves TCP connections maintained in the kernel.

Note: To use nonstop active routing, you must also configure graceful Routing Engine switchover.

For a list of protocols and features supported by nonstop active routing, see Table 11.

For more information on nonstop active routing, see Nonstop Active Routing Overview.

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