[c-nsp] CSC unable to ping PE address

Oliver Boehmer (oboehmer) oboehmer at cisco.com
Fri Oct 31 13:10:31 EDT 2008

kevin gannon <> wrote:
> I have a basic CSC topology and am having inconsistent problems on
> both 12.2(25)S9 and also on S15
> Below is a snip of the configs from both boxes. The issue is on the CE
> if I try to ping the PE it does not work. You can see the
CE is tagging a
> label of 20 on the packet but it is not been seen in the CE
> forwarding table. Also on the PE has no label twenty installed

> Rack1R2#show mpls for vrf csc
> Local  Outgoing      Prefix            Bytes Label   Outgoing   Next
> Label  Label or VC   or Tunnel Id      Switched      interface
? 20     Pop Label[V]  687164        Se2/2      

The PE has label 20 installed, however it didn't store this as an
aggregate label (to trigger another lookup), which is wrong. This looks
like a bug, but can't dig into this further right now (sorry, need to
run).. you might want to contact TAC.


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