From: John Neiberger (neiby@xxxxxxxxxx)
Date: Mon Feb 04 2002 - 12:57:40 GMT-3
That statement is certainly true but I thought we were
discussing eBGP, not iBGP. I thought he was referring to a
scenario where an eBGP peer receives an update from another
eBGP peer that includes its own ASN.
Let's say AS1 has routers A and B, both of which are connected
to AS2, routers C and D. Both A and B advertise their prefices
to C and D who in turn trade updates. Then C will advertise
back to AS1 the routes it learned from D. The receiving router
in AS1 will see its own ASN in the AS-PATH and drop the update.
I believe that the original poster thought that AS2 wouldn't
even transmit an update to AS1 that had AS1 in the AS-PATH.
I'm fairly sure that it is up to the receiving router to check
the AS-PATH for its own ASN, not the advertising router.
Regards,
John
This archive was generated by hypermail 2.1.4 : Thu Jun 20 2002 - 13:46:11 GMT-3