From: Hash Aminu (hashng@gmail.com)
Date: Sat May 05 2007 - 02:59:44 ART
Anees,
The BGP fall over feature AFAIK is used to accelerate the change in decision
process in the protocol. If BGP fast external fallover is disabled, the BGP
routing process will wait until the default hold timer expires (3
keepalives) to reset the peering session.
The bgp Fast-external fallover
1. Its use on a routing process basis (not per neighbor)
2. Only directly connected peering sessions are supported
3. You can configure it under the interface with ip bgp
fast-external-fallover
The neighbor fall-over
1. This feature is event driven and configured on a per-neighbor basis.
When this feature is enabled, BGP will monitor the peering session with
the specified neighbor.
2. Note that the Neighbor fall-over is applicable to neighbors that are not
Directly connected. That may be what you are looking for.
To me they do the same thing though in a difference configurable way.
HTH
Hash
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