Community discussions

MUM Europe 2020
 
hajid
Frequent Visitor
Frequent Visitor
Topic Author
Posts: 96
Joined: Wed Mar 30, 2005 10:04 am

2 bgp peer auto failover how to?

Tue Dec 12, 2006 6:07 am

is there any one implemented auto failover with 2 bgp peer. would you share with me. if 1 bgp peer down so the network will advertise to other bgp peer automaticly.
 
User avatar
tneumann
Member
Member
Posts: 394
Joined: Sat Apr 16, 2005 6:38 pm
Location: Germany

Tue Dec 12, 2006 11:04 am

That is not the way BGP is supposed to work. You should always advertise your network to both peers (and learn routes from both), and if you want to prefer one peer over do other when both are online then you can play tricks with AS PATH length, local preference and MED.
There is no active/standy concept as such in BGP.

--Tom
 
valens
Trainer
Trainer
Posts: 246
Joined: Tue Jun 01, 2004 5:42 pm
Location: INDONESIA
Contact:

Tue Dec 12, 2006 11:14 am

You can try to advertise different subnet size to each peer.

For example (your IP are 10.0.0.0 - 10.0.1.255 or /23):

Peer A for 10.0.0.0/24
Peer B for 10.0.0.1/24

You can advertise to :

Peer A:
- 10.0.0.0/24
- 10.0.0.0/23

Peer B:
- 10.0.0.1/24
- 10.0.0.0/23

So if you have peer problem with Peer A, 10.0.0.0/24 still work through the other peer, as it's also advertise as 10.0.0.0/23 and vice versa.

Who is online

Users browsing this forum: nichky, TomjNorthIdaho and 96 guests