The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Re: ISIS versus OSPF as IGP
fraanro writes: > > > > what is the recommended IGP for an MPLS TE using RSVP? ISIS or OSPF? > > > The only difference is that for TE updates, ISIS uses different > different TLVs for each update, whereas OSPF may include more info in a > single TLV object. ISIS is somewhat more efficient in the way it uses the space in the packet - multiple TLVs of different types can be put into the same packet. With OSPF, in general, each different LSA type uses a separate packet. ISIS also has partial recomputations of the topology for certain types of minor failuers. OSPF must do a full recalculation of the topology. ISIS appears to be a bit more scalable than OSPF. There's at least one ISIS deployment with over 1000 routers in the domain. The largest OSPF deployments seem to max out at roughly half that. I don't think it matters all that much which protocol is used. Daniel -------- Daniel Jackson Network Engineer CPLANE, Inc. daniel@cplane.com ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml
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