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New Member

BGP on Port-channel

Hello everyone,

on the topology, I have two router A and B, and I want to put between two BGP routers,

my problem is that routers do not bridge connected physically, but through a port-channel (Vlan 13),

Do you think I can do the routing between the router A and B(even if Port-channel), and ensure the communication between them for have redundancy ?

I do not know how to configure the router iBGP between both router A and router B ?

Config eBGP:

Router A:

routeur bgp 100

neighbor 12.12.12.2 remote-as 2

network 10.10.10.0 mask 255.255.255.0

Router B:

router bgp 100

neighbor 13.13.13.2 remote-as 2

network 11.11.11.0 mask 255.255.255.0

Router ISP:

router bgp 2

neighbor 12.12.12.1 remote-as 100

neighbor 13.13.13.1 remote-as 100

network 10.218.218.0 mask 255.255.255.0

Config iBGP:

Router A:

neighbor ??????? remote-as 2

neighbor ??????? next-hop-self

....

Router B:

neighbor ??????? remote-as 2

neighbor ??????? next-hop-self

....

1 ACCEPTED SOLUTION

Accepted Solutions
New Member

Re: BGP on Port-channel

The only requirement for iBGP neighborship is reachability. If you can ping Router A from Router B, you should be able to establish an iBGP neighborship so your config should work:

Config iBGP:

Router A:

neighbor 14.14.14.2 remote-as 2

neighbor 14.14.14.2 next-hop-self

....

Router B:

neighbor 14.14.14.1 remote-as 2

neighbor 14.14.14.1 next-hop-self

....

Are you unable to configure the above?

If you want real redudnancy, you should configure the iBGP peering to be between the loopbacks for Router A and Router B. Therefore, if the Port-channel between them goes down, the iBGP session will continue to work ( the IGP reconverges to take the path through Router X and Router Y.

** Rate if helpful **

2 REPLIES
New Member

Re: BGP on Port-channel

The only requirement for iBGP neighborship is reachability. If you can ping Router A from Router B, you should be able to establish an iBGP neighborship so your config should work:

Config iBGP:

Router A:

neighbor 14.14.14.2 remote-as 2

neighbor 14.14.14.2 next-hop-self

....

Router B:

neighbor 14.14.14.1 remote-as 2

neighbor 14.14.14.1 next-hop-self

....

Are you unable to configure the above?

If you want real redudnancy, you should configure the iBGP peering to be between the loopbacks for Router A and Router B. Therefore, if the Port-channel between them goes down, the iBGP session will continue to work ( the IGP reconverges to take the path through Router X and Router Y.

** Rate if helpful **

New Member

Re: BGP on Port-channel

Hello Joseph,

Thank you so much for you help!

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