[c-nsp] 6500: MPLS and Netflow coexistance questions

Alexandre Snarskii snar at paranoia.ru
Fri Jun 10 09:30:42 EDT 2005


Hi!

Can anybody comment my assumptions on coexistence of MPLS switching
and Netflow on 65xx series (with sup2, mpls switching on ge-wan
cards, ios version 12.2.17SXD8)
(Sorry for asking there, but that topic is either not covered on
www.cisco.com, or at least i was unable to find documentation :(
Any links to documentation will be highly appreciated)
                                                                
a) L3 routed ip packets, which entered switch unlabeled and then forwarded 
over mpls path - get recorded into netflow table.

b) MPLS switched (i.e., packets, entered router being labeled, and
exited router being labeled too) packets does not getting into the
netflow table. (May be, in some next release with netflow v9 they
will be, but not with the current 12.2.17sxd - 12.2.18sx releases..)

c) Packets, which entered switch labeled and then label removed
and packet forwarded unlabeled by default not recorded into netflow 
table, and you need to explicitely configure 'mpls netflow egress'
on egress interface for that packets to be recorded in netflow table
(also, interesting question is that is this feature supported for
6500: feature navigator says 'no', but for the same ios number/featureset
for 7600 it says 'yes').

d) packets, entering and exiting EoMPLS crossconnects are not entering
netflow table.



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