> > Can't you run OSPF over GRE ? For ISIS Henk had proposal not so long ago > > to run it over TCP too. > > > https://datatracker.ietf.org/doc/html/draft-hsmit-lsr-isis-flooding-over-tcp-00 > > you can run anything over GRE, including IGPs, and you don't need TCP > transport for that. I don't see the relevance here. Are you suggesting > to create GRE tunnels to all PEs that need the pulses? Nah, that would > be an ugly requirement. >
Well I am not talking about PE-PE anything here. I am talking about interested PEs setting such directed IGP sessions to ABRs who have the information. And that can be just your local area ABRs if those will in turn create similar sessions to "other side" area0 ABRs - endorsing hierarchical design. Or it can be target area ABRs too. After all, the number of ABRs in any network is usually not big. Now obviously it would be pretty stupid to request anyone to do it by confguration (regardless if this would be manual or automated). However, injecting info indicating that capability of ABR in a given area and allowing to simply apply encapsulation from PE to ABR with zero cfg seems to be pretty trivial to accomplish. And the reason I mentioned TCP was to avoid such encap. Cheers, R.
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