[AusNOG] Multi-path route maps

[Joshua D'Alton]

So I think I understand, you want some traffic to go OUT via 2nd link, then
be forced to come BACK via 2nd link? And all other traffic via the 1st
link? (Or at least you don't care if other traffic comes back via 2nd link
too, just so long as THIS specific traffic only uses the 2nd link)?


On Mon, Dec 2, 2013 at 10:46 AM, Joseph Goldman <joe at apcs.com.au> wrote:

> Hi List,
>
>  In a project of ours we currently have 2 alternate paths between 2 points
> of our own network.
>
>  We wish to use route-maps to send certain traffic via the alternate path,
> which is a fairly trivial task, however we would like suggestions on a
> method to ensure the traffic is sent back via the alternate path.
>
>  The default routes etc are all via primary path. The IP's are public
> routed IP's, so a traditional NAT table with alternate public IP won't be
> of assistance, and as we are trying to do this protocol based we can't
> change the route for these single IP's.
>
>  External routing to the internet will all arrive back at this router, we
> just need to control the route based on the source path used.
>
>  I believe this will be achieved with some form of different NAT table.
> The 2 links both deliver between a single pair of Cisco C3900's. I would
> appreciate if anyone who has accomplished such a thing to push me in the
> right direction of the feature name etc that I should be looking at.
>
> Thanks,
> Joe
>
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