Ondrej Zajicek <santiago@crfreenet.org> wrote on 2010/12/16 00:14:43:
On Wed, Dec 15, 2010 at 02:27:31PM +0100, Joakim Tjernlund wrote:
I remember we had an discussion about multiple unnumbered ptp links between two nodes. There was a potential problem in OSPF with asymmetric routing but the conclusion was that it would not happen as BIRD didn't support ECMP. Now that BIRD does support ECMP, has the above "problem" been fixed too?
Yes, the next hop computation was changed to handle that case.
I took a quick look and I don't think it will work reliably: /* The second case - ptp or ptmp neighbor */ if ((en->lsa.type == LSA_T_RT) && (par == oa->rt)) { ... WALK_LIST(ifa, po->iface_list) if (match_rtlink(ifa, rtl)) { struct ospf_neighbor *m = find_neigh(ifa, rid); if (m && (m->state == NEIGHBOR_FULL)) return new_nexthop(po, m->ip, ifa->iface, ifa->ecmp_weight); } return NULL; This will find any ptp link that matches and several of them will match. I still think the only reliable method that will work in any case is the one we discussed earlier. It is much faster too. Jocke