Background Information
- The keepalive and hold timers control adjacency.
- The advertisement-interval control how often to send updates.
- The scan-interval timer controls how often to process the BGP table and update the RIB.
- If these timers are not set appropriately, they can either propagate instability in the network, or they make it so that the network is not reacting to changes fast enough to take corrective action.
Summary
- neighbor timers to set keepalive and hold time for the neighbor.
- neighbor advertisement-interval to set the interval for sending updates.
- bgp scan-interval to set the timing of periodic processing of the BGP table for best path.
- show ip bgp neighbor to see the timers set.
router bgp 6500
neighbor 10.1.1.1 timers 60 180
neighbor 10.1.1.1 advertisement-interval 30
