Ondrej Zajicek <santiago@crfreenet.org> wrote on 2010/12/21 03:38:35:
On Tue, Dec 21, 2010 at 01:20:41AM +0100, Joakim Tjernlund wrote:
Or if you means case like: Router A having two interfaces (with IP1 and IP2) connected to the same network N, router B also connected to network N may use multihop to IP1 and IP2 for routes that goes through router A. It is true that in that case BIRD does not use multihop (and there are some other corner cases, where multihop also is not used although it could be).
yes, this one. Seems like multihop only works for ptp links then ? perhaps not a big deal? I would think users of ECMP would like this case to work too though.
This scenario expects there is just one network between the routers and one router has two interfaces to that network, which is generally configuration not well supported by OSPFv2. So i don't think it is a big deal.
Not common but very cool if that worked too. You get higher bandwidth that way and you are compliant with the OSPF spec too.
But now i realized that a scenario with two parallel links where both are bcast (not ptp) would not work with ECMP, which is probably what you wanted to notify me of. This would be fixed.
Precisely :)