Enable BGP PIC

You can enable BGP Prefix-Independent Convergence to accelerate data path convergence under failover conditions.

About this task

BGP PIC is disabled by default.

1. Enter global configuration mode.
   

   device# configure terminal

2. Enable BGP.
   

   device(config)# prefix-independent-convergence

3. Confirm the configuration. Backup paths are not displayed in the output.
   

   device(config)# show running-config

4. Confirm changes in the next-hop path.
   

   device(config)# show ip route
   IP Routing Table for VRF "default-vrf"
   Total number of IP routes: 2
   '*' denotes best ucast next-hop
   '[x/y]' denotes [preference/metric]
   
   10.20.30.0/24,
       *via DIRECT, Null0, [1/1], 0m11s, static, tag 0
   10.20.31.0/24,
       *via DIRECT, Null0, [1/1], 0m5s, static, tag 0
   

   Although the route remains untouched in hardware, the timestamps (highlighted in the example) reflect changes in the next-hop path.

Example

The following example summarizes the commands in this procedure.

device# configure terminal
device(config)# prefix-independent-convergence
device(config)# show running-config
device(config)# show ip route