[c-nsp] label-allocation-mode per-ce Operational experience

[Harold Ritter (hritter)]

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 » <saku at ytti.fi> 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  cisco-nsp at puck.nether.net
>https://puck.nether.net/mailman/listinfo/cisco-nsp
>archive at http://puck.nether.net/pipermail/cisco-nsp/