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SearchEnterpriseWAN
290 pts.
 Able to ping L3 VPN but unable to tracepath
BGP, L3 VPN, Linux hosting
I am running an L3 VPN between 2 edge routers and have connected one router to a client (Linux Host). I tried pinging from the client an IP address (present on the other router) that was learnt via BGP VPN. It's pinging, but I am unable to do tracepath from the client. It gives me a "No Reply" after it goes to the interface of the router connected to the client. Why is this happening? Could anyone please explain this behavior?

Software/Hardware used:
ASKED: February 14, 2012  8:07 PM
UPDATED: March 2, 2012  6:23 PM
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Answer Wiki:
SearchEnterpriseWAN.com's resident VPN expert, Rainer Enders, has responded to your question here: <a href="http://searchenterprisewan.techtarget.com/answer/Why-am-I-able-to-ping-but-not-do-tracepath-over-my-Layer-3-VPN">Why am I able to ping but not do tracepath over my Layer 3 VPN?</a>
Last Wiki Answer Submitted:  March 1, 2012  3:14 pm  by  Tessa Parmenter   440 pts.
All Answer Wiki Contributors:  Tessa Parmenter   440 pts.
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Just try the command as: man tracepath, and hope u’ll get ur ans from there. R u trying traceroute and what it replied, with this u can get a maximum number of hops.

Subhendu Sen
 22,125 pts.
 

Could your problem be connected with some UDP filtering and/or ICMP reply prohibition on the router?

petkoa
 3,120 pts.