BGP AS number

[4everlearning]

Hi Guys,

Let's say I have 2 CEs that use different VRFs (VRF light), can I use only one BGP AS number to peer with different PEs? or should the AS number be configured per VRF?

Thanks,

[Peter Paluch · Accepted solution]

Hi,

can I use only one BGP AS number to peer with different PEs?

Not only you can - you have to. Regardless of presence and count of VRFs, you can start only a single BGP process in your configuration. It is, to my best knowledge, not possible to configure AS numbers on a per-VRF basis in BGP.

There is an option of pretending that your BGP ASN is different than the true one, activated using the neighbor local-as command. However, this is not a typical use case for this command, and if you can avoid it, you should.

Best regards,
Peter

[4everlearning]

Thank you, Peter.