From: Nate Van Maren (Nate@xxxxxxxxx)
Date: Sun Aug 19 2001 - 21:14:00 GMT-3
..So you are backing up a link with ISDN, and you need to keep your IBGP
neighbor relationship even if you're running on the backup circuit.
I would use the loopback addresses of the bgp routers when establishing the
neighbor relationship. This way the BGP traffic normally goes across the
primary link, and when it goes down, and the ISDN comes up, you'll have routes
to the loopback addresses across the ISDN.
>From what it sounds like, you are using the ISDN interface's IP address to
form your neighbor relationships, instead of the loopback's.
Remember to use the update-source parameter.
Thanks
-Nate Van Maren
CCIE #7911
>>> "Johnny Dedon" <johnny.dedon@exodus.net> 08/19/01 03:54PM >>>
Guys,
I ran into a one I can't quite figure out how to handle...
If I have a network where I implement an ISDN link for backup using ospf
demand circuit and I get everything working properly. I then add BGP where I
have an IBGP relationship between two routers that are seperated by the
network that is being backed up by the demand circuit. If the network goes
down the ISDN link picks up but will never die because of the keepalive
timers
from the bgp relationship. Any ideas on what to do here?
Johnny Dedon
Senior Staff Consultant
Exodus Professional Services
johnny.dedon@exodus.net
www.exodus.net
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