enter image description hereI got two routers on my network and I am pinging one router's serial port ip address from that router itself. by checking traceroute I found ping is going outside to neighbor router which is directly connected via serial link on the same port I am pinging.what is the reason of that traceroute behaviour? Image of Router R1, traceroute from R1 to R2, R1 have ip address of and R2 have

  • You need to provide more information. A diagram would be good, and we need the router configurations and traceroute. Edit your question to include these.
    – Ron Maupin
    Dec 18, 2016 at 20:04
  • Please, never put text in an image in your question or answer. Copy the text, paste it into your answer, and use the Preformatted Text feature ({}) on the text. We need the full router configurations, too.
    – Ron Maupin
    Dec 18, 2016 at 20:13
  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you could provide and accept your own answer.
    – Ron Maupin
    Aug 15, 2017 at 16:47

1 Answer 1


Because of when you traceroute you own IP address on a point-to-point serial interface the ICMP packet goes over the wire to the other side and back.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.