From: Matt Smith (matt-n-donna@xxxxxxxxxxxxxx)
Date: Sun Nov 25 2001 - 22:02:24 GMT-3
Hey all,
I just got done doing some last minute BGP practice scenarios in preperation
for my upcoming date with fate on 11/30. At any rate I was making some quick
and dirty lab scenarios to test some varios configurations and I found the
following
R1 <----->R2<------->R3
R1 is configured with a 0.0.0.0 route to R2 and R3 with a 0.0.0.0 route to R2
as well. I pinged from R1 to R3 and communicationed worked fine.
Now I issued router bgp 100 on both R1 and R2 and defined the neigh bor
statements for iBGP.
The BGP relationship never came up. AS#s were correct on both router
processes and neighbor statements and the IP addresses were correct as well.
show ip bgp neighbor reports that neither router has sent or recieved and BGP
messages and a deb ip packet verifies that this is true.
What was the culprit? well........... Make a guess then read on
I issued a static route for the specific address of the neighbor on each
router (R1 and R3) pointing to R2 and the relationship came up. Apparently
BGP requires a route in the routing table for the nieghbor address and will
not use the 0.0.0.0 route. IP classless enabled on both routers and as I
stated both routers could ping one another. Has anyone ever read and
documentation supporting this to be true? I have never seen any rules
pertaining to this issue so I thouht I would share it with the group. Just a
quick tidbit. Hope it helps someone someday.
Luck to All
Matt Smith
This archive was generated by hypermail 2.1.4 : Fri Jun 21 2002 - 06:45:22 GMT-3