Unlike the per-vrf label allocation mode, The per-ce mode does not cause an IP lookup on the egress PE. Traffic is rather label-switched directly to the egress interface leading to the CE.
Regards Le 2012-11-14 09:42, « Saku Ytti » <[email protected]> a écrit : >On (2012-11-14 15:25 +0100), Adam Vitkovsky wrote: > >> Is anyone using label-allocation-mode per-ce instead of the default >> label-allocation-mode per-prefix in production mpls backbone please? >> If yes, do you have any negative experience? > >If you mean XR specifically, the no. I don't run any XR platforms today. > >But generally, yes. It does work, but you should understand that it means >you are doing IP lookup in egress. This means that certain hub+spoke >configurations do not work as intended. This also means hardware does more >work to find egress rewrite information, for some platforms it will mean >reduced pps rate. > >On positive side, it'll reduce FIB usage. > >My personal feeling is, that I would not run it, unless I need to. But >this >isn't single correct truth. >-- > ++ytti >_______________________________________________ >cisco-nsp mailing list [email protected] >https://puck.nether.net/mailman/listinfo/cisco-nsp >archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
