Rajat wrote: > Can any one provide me any solution to overcome this problem. In addition to PMTUD, you should have PMUTD availability discovery that if it is discovered, say by persistent lack of responses, that PMTUD is not working, you should turn off PMTUD and just live with fragmentations. I recommend that, to avoid long initial delay and intermediate lack of communication after path changes of, PMTUD should turnd off by default and should be activated only on extreme conditions. Further, it should be noted that PMTUD is so unreliable that no applications rely on it, which means that even under extreme conditions rational operators won't turn on PMTUD. In short, forget PMTUD. Masataka Ohta _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf