Skip to main content
Network Engineering

Return to Question

Grammar problems fixed
Source Link
edit approved Jun 9, 2016 at 4:40
Nate Zaugg
edit approved Jun 9, 2016 at 4:40
Nate Zaugg
  • 103
  • 5

What happens when a BGP link is lost and themthen came back up?

Let's say we have two routers running a BGP that is fully converged and both routers are advertising routes to each other. The link between them fails (physically so to speak). Now, after the hold down timer and both routers deemed the other as down. What happens when the link comes back to life? Do we have to re configure-configure the BGP session all over again? If nonot, what happens to the networks that are advertised from each router to the other, is? Is it instantly advertised again once the link comes back up, or there is some kind of update timer so that each router deems the other as an up neighbor?

What happens when a BGP link is lost and them came back up?

Let's say we have two routers running a BGP that is fully converged and both routers are advertising routes to each other. The link between them fails (physically so to speak). Now, after the hold down timer and both routers deemed the other as down. What happens when the link comes back to life? Do we have to re configure the BGP session all over again? If no, what happens to the networks that are advertised from each router to the other, is it instantly advertised again once the link comes back up, or there is some kind of update timer so that each router deems the other as an up neighbor?

What happens when a BGP link is lost and then came back up?

Let's say we have two routers running a BGP that is fully converged and both routers are advertising routes to each other. The link between them fails (physically so to speak). Now, after the hold down timer and both routers deemed the other as down. What happens when the link comes back to life? Do we have to re-configure the BGP session all over again? If not, what happens to the networks that are advertised from each router to the other? Is it instantly advertised again once the link comes back up, or there is some kind of update timer so that each router deems the other as an up neighbor?

Tweeted twitter.com/#!/StackNetworkEng/status/550596671101763584
Source Link
Abdelrahman
Abdelrahman
  • 51
  • 1
  • 2

What happens when a BGP link is lost and them came back up?

Let's say we have two routers running a BGP that is fully converged and both routers are advertising routes to each other. The link between them fails (physically so to speak). Now, after the hold down timer and both routers deemed the other as down. What happens when the link comes back to life? Do we have to re configure the BGP session all over again? If no, what happens to the networks that are advertised from each router to the other, is it instantly advertised again once the link comes back up, or there is some kind of update timer so that each router deems the other as an up neighbor?