[c-nsp] traceroutes via mpls network - works for on-net but not for off-net (def rt)

Christian Meutes christian at errxtx.net
Fri Sep 5 12:48:55 EDT 2014

On 2014-09-05 15:41, Aaron wrote:
> is one of my l3vpn customer subnets and I can trace to
> it and see all my mpls p hops along the way... (mpls p boxes are
> 172.20.x.x) (not sure why the penultimate hop times out.... but
> perhaps that's another topic)

(1) You are sure that is not dropping your 172.20.x.x
addresses and (b) you are also not filtering 172.20.x.x on your PE-CE

(2) You could set label-allocation-mode to VRF on the PE peering with
the CE, for this VRF only (downside: you would lose some features like
eiBGP load-sharing and such). That way your PE would route the ICMPs
back to the source.

I don't think there are other solutions.

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