Why am I able to ping but not do tracepath over my Layer 3 VPN?
Our VPN expert explains why a Layer 3 VPN can ping but not do a tracepath from the client in this response.
Have you tried using traceroute instead of tracepath? Tracepath uses a range of User Datagram Protocol (UDP) ports, one or many of which might be blocked at the firewall. I suspect this is what’s happening, although I recommend further testing and analysis to figure out the root cause. Also, sometimes tools with lower privilege levels have limitations. For your situation, I suggest trying traceroute and also verifying the firewall protocols. Given what you’ve described, the IP routing appears to be functional.
View other responses to this question on the IT Knowledge Exchange (please note: SearchEnterpriseWAN.com and IT Knowledge Exchange registration are the same): Able to ping L3 VPN but unable to do tracepath
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