[j-nsp] Traceroute Throught MPLS Core

[Mark Tinka]

Hi all.

We recently moved some Cisco P routers over to Juniper.

Since then, we've been seeing [* * *] for traceroute packets 
hitting the P routers from anywhere outside the MPLS domain 
(there's no issue for PE routers tracerouting within and 
outside the domain).

This was working fine before with the Cisco's. We've pretty 
much replicated the IOS MPLS configuration for JunOS, and 
MPLS forwarding in the core is working fine.

We've tried to use the ICMP Message Tunneling feature, to no 
avail.

We've also seen PR/396280 which looks similar to our case, 
but uncertain whether it's related.

We are running JunOS 9.3R2.8.

All help appreciated.

Cheers,

Mark.
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