[c-nsp] Sending traffic over different paths

[Kristofer Sigurdsson]

Hi,

2006/1/23, Oliver Boehmer (oboehmer) <oboehmer at cisco.com>:
> Kristofer Sigurdsson <> wrote on Monday, January 23, 2006 11:54 AM:
>
>
> > I was wondering if anyone on the list had any suggestions on how to
> > implement the following:
> [...]
> >
> > Traffic to and from peers via RTR_D (identified by source IP
> > addresses or BGP communities) use Link A to go to and from RTR_A.
> >
> > Traffic to and from peers via RTR_C (identified by a default route or
> > BGP communities) use Link B for traffic to and from RTR_A.
> >
> > Should either Link A or Link B go down, all traffic goes through the
> > other one.
>
> Even though I'm not sure I understood your exact topology, MPLS Traffic
> Engineering, possibly using static and/or policy-routing at the edge, is
> usually a good technology to achieve this. You build two tunnels from A
> to C and D, and auto-route C's next-hop to the tunnel (and likewise
> towards D). Same goes for the reverse direction. No need for
> policy-routing in the middle as this is done during tunnel setup. In
> case your links go down, tunnel can be re-optimized over the alternate
> path or can go down and you will just forward using your regular IGP..

Ahh.  A nice one. :)  Thanks a lot.