Hello, I have the followoing BGP config on my router using two BGP neighbours for redundancy in case the link to the first neighbour fails.
I have noticed when the primary neighbor fails, the cutover to the secondary neighbor is immediate i..e there is only about one second when the network goes down during this transition.
My question is how does my router find out immediately that the route via the primary neighbour is down i..e I thought there was more delay when BGP neighbours informed others about routes being down ?
Thanks kindly for any info.
router bgp 65099
bgp log-neighbor-changes
network 10.21.32.0 mask 255.255.255.0
neighbor 192.168.3.6 remote-as 7722
neighbor 192.168.3.6 soft-reconfiguration inbound
neighbor 192.168.3.6 route-map LCP_IN in
neighbor 192.168.3.14 remote-as 7722
neighbor 192.168.3.14 soft-reconfiguration inbound
neighbor 192.168.3.14 route-map PREPEND_OUT out
route-map LCP_IN permit 10
set local-preference 500
!
route-map PREPEND_OUT permit 10
set as-path prepend 65099 65099 65099
