I request you to clarify the following concepts in BGP Protocols.
"Minimum time between advertisement runs is 30 seconds"
"keepalive interval is 60 seconds"
I am aware that keepalive is sent between the peers to identify the presense of the peer. But how about advertisement / update.
I am sure that update is triggered only when changes are there in the network.
Then what is the time 30 seconds mentioned in the advertisement timer. I noticed that even though a prefix is removed from routing table, BGP table is not getting changed for a while. It takes some time to get changed.
Please clarify the concept
Hello R. B. Kumar,
as I wrote this is the price to pay for scalability.
in an iBGP context in addition to timers tuning, you can take advantage of some advanced features like next-hop tracking.
this can speed up BGP path removal when the next-hop route disappears in the IGP.
Hope to help