Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

For example MTU of Ethernet is 1500.

Now if the packets are fragmented, then observed MTU will be the MTU of the router (i.e. less than 1500).

Is there any method to find out the type of the client network reliably and accurately?

share|improve this question
Rather no. But ur question is to vague and fuzzy. – poige Oct 17 '12 at 6:54

It sounds to me like you want to know about PMTU Discovery. See RFC 1191.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

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