From: Carlos G Mendioroz (tron@xxxxxxxxxxx)
Date: Thu Jun 06 2002 - 06:44:53 GMT-3
Ouch!
If <you have a good design> and <some source addresses> match one
of your <igp areas> then
you might just let IGP do its work, routing each area to
the nearest exit point looking for default route to exit.
Else
// You are in trouble...
If you can tweak your design, do it.
Else
// Policy route seems the only option
But policy route can force next hop or interface,
nailing your routing for at least one of the exits,
and AFAIK, you can not do it routing sensitive.
Fi
Fi
The only "clean" way I can think of is routing by default towards
the exit points, and have a tunnel between the two exit
points, doing policy routing in both to divert the traffic to
the intended exit via the tunnel.
You would policy all interfaces BUT the tunnel, so traffic coming
through it will always go out "here", and peer throw the tunnel so
that if one exit goes down, all traffic would go to the other exit.
Oliver Burgstaller wrote:
>
> hello
>
> assume you have a network with to exit point out of your AS, and
> you would like to route some source addresses out of one exit point
> an other source addresses out of the other exit point. If one exit
> point will fail routing will also work. The two exit point are BGP peer4s
> to diffrent AS.
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