hi peter, Just curious: Do you have an idea how to make short-lived LSPs compatible with the problem stated in https://datatracker.ietf.org/doc/html/rfc7987
Would like to hear your thoughts on that. thanks, /hannes On Tue, Nov 30, 2021 at 01:15:04PM +0100, Peter Psenak wrote: | Hi Robert, | | On 30/11/2021 12:40, Robert Raszuk wrote: | > Hey Peter, | > | > > #1 - I am not ok with the ephemeral nature of the advertisements. (I | > > proposed an alternative). | > | > LSPs have their age today. One can generate LSP with the lifetime of 1 | > min. Protocol already allows that. | > | > | > That's a pretty clever comparison indeed. I had a feeling it will come | > up here and here you go :) | > | > But I am afraid this is not comparing apple to apples. | > | > In LSPs or LSA flooding you have a bunch of mechanisms to make sure the | > information stays fresh | > and does not time out. And the default refresh in ISIS if I recall was | > something like 15 minutes ? | | yes, default refresh is 900 for the default lifetime of 1200 sec. Most | people change both to much larger values. | | If I send the LSP with the lifetime of 1 min, there will never be any | refresh of it. It will last 1 min and then will be purged and removed from | the database. The only difference with the Pulse LSP is that it is not | purged to avoid additional flooding. | | | > | > Today in all MPLS networks host routes from all areas are "spread" | > everywhere including all P and PE routers, that's how LS protocols | > distribute data, we have no other way to do that in LS IGPs. | > | > | > 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. | | thanks, | Peter | | | > | > Seems like a perfect fit ! | > | > Thx, | > R. | _______________________________________________ Lsr mailing list [email protected] https://www.ietf.org/mailman/listinfo/lsr
