[c-nsp] Redundant default route, without round-robin routing

[Tim Franklin]

On Thu, September 27, 2007 5:46 pm, Vincent De Keyzer wrote:

> To answer Tim's question: I don't really care, traffic can go to both A
> and B, or go to A and then B if A fails: what I care for is
> out-of-sequence packets.

In that case, I'd be inclined to iBGP-mesh all the boxes, inject just a
default into BGP from the two border routers, and let all the other
routers pick their 'best' route of the two.  All other things being equal,
this should be the border router that can be reached with the lowest IGP
cost, or if they're all on a shared medium (I think this was the case from
your original post), first route received.  You might end up with
everybody going out of the same border router, but you've indicated this
is not a problem.  All the routers will have the non-best route in their
BGP table, but not the routing table, so they can switch over if the best
route is withdrawn, but won't ever split traffic between the two.

Regards,
Tim.