Routes redistribution in multi AS eBGP

[ibzjuz]

Hi everyone,

In eBGP, is it possible to distribute routes across multiple AS ? Like this :

AS1---AS2---AS3

Is it possible to redistribute AS1 routes to AS3 ?

Romain

[Mike.Cifelli]

You can accomplish this with eBGP. By default eBGP TTL is set to 1 so if you are not directly connected it is going to get discarded. However, you can fix it by issuing the ebgp-multihop command. So for example in your scenario it would look something like this:
#neighbor (AS3 IP) ebgp-multihop 2
And then vice versa
Then under the respective address family redistribute as you wish once your adjacency comes up. Good luck & HTH!

[ibzjuz]

Thanks for your feedback.

My problem is that I don't have access to the AS3 router it's a provider router.