Just in case someone didn't see this
mogul (Jeffrey Mogul) Mon, 10 September 1990 18:04 UTC
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From: mogul (Jeffrey Mogul)
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Date: 10 Sep 1990 1104-PDT (Monday)
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Subject: Just in case someone didn't see this
------- Forwarded Message From: Greg Vaudreuil <gvaudre@NRI.Reston.VA.US> Date: Mon, 10 Sep 90 10:10:01 EDT To: Jon Postel <postel@venera.isi.edu>, IAB@venera.isi.edu Subject: MTU Discovery to Proposed Standard Cc: IETF@venera.isi.edu, IESG@NRI.Reston.VA.US To: Jon Postel, IAB From: IESG Cc: IETF Re: MTU Discovery The IESG recommends to the IAB that the internet-draft <draft-ietf-mtudisc-pathmtu-02.txt> be published as a proposed standard. This is the work of the MTU Discovery Working group of the IETF. This draft specifies a mechanism for discovering the path MTU. The mechanism consists of occasionally sending a long datagram with the don't fragment bit set (DF). If the datagram is too long, an ICMP error message "datagram undeliverable due to DF bit set and fragmentation needed" is returned. This protocol requires a small change to routers. This protocol uses 16 bits of a previously undefined header field of the ICMP message to return the size of the slower link causing the error. This protocol will also work with non-upgraded routers with performance at least as good as current practice. This draft presents many implementation techniques to improve performance with old routers. Status of this Memo This document defines a proposed standard mechanism for discovering path MTU. It is the product of the IETF MTU Discovery Working group. Send comments to mtudwg@decwrl.dec.com. Distribution of this memo is unlimited. Greg Vaudreuil IESG-Secretary ------- End of Forwarded Message
- Just in case someone didn't see this Jeffrey Mogul