* Philip Matthews <[email protected]> > We are looking particularly at combinations of the following IGPs: > IS-IS, OSPFv2, OSPFv3, EIGRP.
We're using OSPFv2 and OSPFv3 as ships in the night for IPv4 and IPv6, respectively. That said, somewhere far down in the darkest depths of my TODO list I have an item about investigating the possibility of replacing OSPFv2 for IPv4 with OSPFv3 + RFC 5838. I see this possibility is briefly mentioned in your I-D - if you're able to gather more information about the viability of such a solution, that would be a very valuable addition to the I-D, I think. As an aside, I can mention that we're using AH for OSPFv3 authentication. I sometimes see people saying AH is never used for anything anymore and should be deprecated, but I'm not sure if there are any real alternatives to AH for securing OSPFv3? > If you run something else (RIP?) then we would also like to hear > about this, though we will likely document these differently. [We > suspect you run RIP/RIPng only at the edge for special situations, > but feel free to correct us]. Indeed, we run RIPv2 and RIPng on the edge to allow certain customer systems to advertise service addresses that can move between locations for redundancy reasons (or anycasted services). These advertisements get immediately turned into external routes in OSPF (in other words we do not have a RIP topology). To get speedy failover we lower the RIP timers as low as they can go, and have the customers send updates every second. Using BFD would be an alternative to lowering timers, but we haven't yet been able to deploy that because BIRD (which we're typically using on the customer systems) doesn't support BFD for RIP. I do feel rather dirty using RIP in 2015, so I would be interested in hearing about any alternatives approaches folks are using. We're not using BGP because we'd have to pre-configure every neighbour on the upstream router (not useful in dynamic or "cloudy" environments), nor OSPF because we need the ability to filter out invalid advertisements from the customer systems. Tore
