Rémi, I agree with you assertions concerning "ping" versus TCP; however, I am looking for some concrete documentation or experiences.
Best Regards, Jeffrey Dunn Info Systems Eng., Lead MITRE Corporation. (301) 448-6965 (mobile) -----Original Message----- From: Rémi Denis-Courmont [mailto:rde...@simphalempin.com] Sent: Wednesday, January 21, 2009 2:33 PM To: ipv6@ietf.org Cc: Dunn, Jeffrey H.; ipv6-boun...@ietf.org; v6...@ops.ietf.org; Sherman, Kurt T.; Liou, Chern; steve_eiser...@uscourts.gov; Huang, Frank; Grayeli, Parisa Subject: Re: End System PMTUD behavior question Le mercredi 21 janvier 2009 20:56:23 Dunn, Jeffrey H., vous avez écrit : > Colleagues, > > We have been performing some PMTUD tests and have found that different > operating systems handle PMTUD differently. Specifically, we found that the > "ping" application behaves in the following way when the PMTU is set to > 1280 and a 1500 octet ICMPv6 echo request is sent to that routed path. The > hosts we tested: I'm afraid ping applications are not representative of what the operating system IP stacks do. Besides, there are no standards regarding the behavior of "ping" in case of Path MTU problems; it's really up to the implementor of each "ping" whether to report an error or to transparently fragment. The behavior of real transport protocols, such as TCP, DCCP and SCTP is more interesting when it comes to evaluating operating systems and their IP stacks. -- Rémi Denis-Courmont http://www.remlab.net/ -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
