[c-nsp] Ignoring BGP routes whose origin is own AS

[Oliver Boehmer (oboehmer)]

Rick Kunkel <> wrote on Tuesday, March 07, 2006 7:48 AM:

 I just wanted to check one thing for now: 
> I was reading today, and ran across something I'd read before but
> forgotten.  It said that BGP speakers ignore routes they hear if that
> route originates in their own AS, which is a step taken to avoid
> routing loops.  What I'm wondering here is if that is applicable
> here.  If NOC1 is announcing routes and NOC2 hears them through the
> Internet, will it ignore them?  

Yes, if NOC1 and NOC2 use the same ASN, either will drop the updates
from the other. You can use "neighbor ... allowas-in <n>" to allow
updates with at most <n> of your own ASN in the path.

	oli