From: Peter van Oene (pvo@usermail.com)
Date: Fri Nov 01 2002 - 15:41:12 GMT-3
At 09:18 AM 11/1/2002 -0800, Jim Terry wrote:
>Hi all,
>
>I have a theoretical question. When I am using no sync in the BGP process
>are there still times that I must redistribute the IGP into the BGP process
>in order to route to another AS where I am not running an IGP between the
>two ASs?
It is highly abnormal to run an IGP between AS's. With the exception of
multihop EBGP where static routes might be used, the AS to AS DMZ usually
consists of a single link, which is link local to each AS's border router.
>For instance, routers A and B are in AS 1 with an IGP and IBGP. Router B
>has EBGP to C and no IGP from B to C. Router C is in AS 2. I cannot ping
>from a loopback on Router B to a loopback on C even though the loopback is
>in the BGP and IP routing tables on B. If I do a mutual redistribution on B
>in the BGP and IGP processes I am then able to ping.
Likely C can't get back to B.
>Is this correct, or am I just doing something wrong?
>
>Thanks,
>
>JT
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