From: Jeff Nelson (jnelson@rackspace.com)
Date: Fri Aug 27 2004 - 13:49:26 GMT-3
To be more specific (and after doing more research), can one advertise
to an ebgp neighbor a more specific route of a supernet it is learning
from the same neighbor? What if it is an identical route? I assume you
would have to filter it with a prefix list.
I realize this is not best practice anycast BGP and that RFC 1930
suggests on prefix one AS, but... how would it be done?
thanks,
jeff
Jeff Nelson(jnelson@rackspace.com)@04/08/27 10:43:
> Say you're advertising a /20 from one AS. You want to take a /24 from
> that and advertise it from another AS--I believe this is an "anycast"
> solution for BGP created redundancy. When that /24 is created on the
> other AS, it does not advertise it to its EBGP peer. Do I have this all
> wrong? It would seem that since the router is receiving a /20 from the
> other AS via EBGP, it won't advertise a subset of that to the same
> neighbor. I though you could as long as it wasn't the same exact route.
>
> ??? any ideas ???
> --
> jeff
>
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-- Jeff Nelson Rackspace Managed Hosting Office: (210) 892 4025 x1601 GnuPG KeyID: 0x7DE7C4E0 @pgp.mit.edu AS Caretaker: 10532 15395 25897 27357 30099 #It's all fun and games until someone loses a packet !!!.!
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