From: jmatus@pacbell.net
Date: Thu Mar 04 2004 - 17:10:46 GMT-3
i have ebpg configured for a 3 as's. each as has 2 ibgp peers. when i look at the bgp table i see the routes to the other as's there and they are also installed in the routing table....soooo question:
if a bgp network show in the routing table, should i be able to ping a router on that network segment of a different as, or does that only work if you have an igp installed (at the moment i have no igp and i cannot ping anything outside the local as that is directly connected)
another question
sometimes i get confused as to what networks i should actually advertise in bgp and why. from my reading in cisco press, it appears that you advertise network segments to ebgp peers that are link no directly between the 2 ebgp peers..which would make sense b/c they would have no knowledge of them. but is there a rule for ibgp router advertisement? for instance, if i have as1 and as2 and i advertise an ether net segment local to as1, should i also advertise the ebgp segmeent to another ibgp peer in as1?
AS 1 AS 2
R1-------R2----------------R3
ETH SERIAL
i can see advertising the ethernet seg of r2 for the ebgp connection so r3 can see it, but would i also advertise the serial seg on r2 (the ebgp connection) so that r1 can see it?? (or should the route propagate through the internal peering)
thanks in advance!
john d matus
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