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Route-Refresh Capability

The route-refresh capability provides a lower-cost alternative to soft reconfiguration as a means to change policies without major disruptions. The router advertises the route-refresh capability when it establishes a BGP session with a peer to indicate that it is capable of exchanging BGP route-refresh messages. If inbound soft reconfiguration is disabled (the default) and you issue the clear ip bgp soft in command, the router sends route-refresh messages to its peers that have advertised this capability. The messages contain a request for the peer to resend its routes to the router. The new inbound policy is then applied to the routes as they are received.

Our implementation conforms to RFC 2918—Route Refresh Capability for BGP-4 (September 2000), but it also supports nonstandard implementations.

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