Russ, I am not not talking about the resolution of nexthops in another context. BTW we have not modeled a "context", so there is every possibility we are talking different things.
I am considering the case where there is more than one backbone to provide BGP/MPLS IP VPNs. The use-case could be purely for administrative purposes. If we put the restriction that there is a single backbone, then it is clear as to how the VRF routing-instance traffic is tunneled over. So RIB could be below the routing-instance in the hierarchy. If there can be multiple backbones, then the relationship has to be expressed as to which backbone the VRF is tunneled over. This information could be in a structure that is not below the routing-instance in the hierarchy. - Sri On Mon, Jul 29, 2013 at 1:30 PM, Russ White <[email protected]> wrote: > > > Carlos, good point. But we also need to ask the question of where we > > express relationships between routing-contexts. E.g. If VPN-1 is being > > transported over Backbone-1 and VPN-2 over Backbone-2. Would these be > > inside the routing context or in a top level object ? > > So you're saying, "what if 10.1.1.0/24 in context 1 is reachable via > 10.1.1.1 in context 2?" The primary way we describe this today is through > tunneling, not through multiple VRF contexts... And I would never expect to > have, "(10.1.1.0/24,context1) is reachable via (10.1.1.1,context2), and ( > 192.168.1.0/24,context2) is reachable via (10.1.1.1,context1)." In fact, > I think all such situations are probably really dangerous in the real > world, and operators would avoid them like the plague. > > But, again, I'm not saying this is a completely nonuseful construct, I'm > just trying to figure out a specific use case for doing such a thing. > > :-) > > Russ > > > _______________________________________________ > i2rs mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/i2rs >
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