Flushing the suboptimal BGP route to the RIB
This feature flushes the suboptimal BGP route to the RIB when the following conditions are met:
The optimal route is generated by the network command or is redistributed by the import-route command.
The suboptimal route is received from a BGP peer.
After the suboptimal route is flushed to the RIB on a network, BGP immediately switches traffic to the suboptimal route when the optimal route fails.
For example, the device has a static route to the subnet 1.1.1.0/24 that has a higher priority than a BGP route. BGP redistributes the static route and receives a route to 1.1.1.0/24 from a peer. After the flush suboptimal-route command is executed, BGP flushes the received BGP route to the RIB as the suboptimal route. When the static route fails, BGP immediately switches traffic to the suboptimal route if inter-protocol FRR is enabled. For more information about inter-protocol FRR, see "Configuring basic IP routing."
To flush the suboptimal BGP route to the RIB:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter BGP view. | bgp as-number [ instance instance-name ] | N/A |
3. Flush the suboptimal BGP route to the RIB. | flush suboptimal-route | By default, BGP is disabled from flushing the suboptimal BGP route to the RIB, and only the optimal route is flushed to the RIB. |