[Sip] Re: [Simple] UDP - what if response is bigger than 1500 bytes (ethernet MTU)?

"Vijay K. Gurbani" <vkg@lucent.com> Wed, 19 July 2006 22:46 UTC

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Date: Wed, 19 Jul 2006 17:46:10 -0500
From: "Vijay K. Gurbani" <vkg@lucent.com>
Organization: Bell Labs Security Technology Research Group
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Subject: [Sip] Re: [Simple] UDP - what if response is bigger than 1500 bytes (ethernet MTU)?
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Thomas Froment wrote:
> This is a good question: I think it was mentionned in last SIP WG IETF 
> meeting that having responses greater than path MTU  (-200 bytes)
> in SIP was not currently well specified. It was an open issue on 
> draft-ietf-sip-hop-limit-diagnostics-03.txt which raises this problem
> since it leads naturally to send big SIP responses.
> SIP WG people may probably answer you if something is planned to handle 
> this problem...

This remains a problem; I have had a quick chat with Scott
Lawrence on it and we'll be submitting a draft latter part
of next week on one way to deal with this.

Thanks.

- vijay
-- 
Vijay K. Gurbani  vkg@{lucent.com,research.bell-labs.com,acm.org}
Bell Laboratories, Lucent Technologies, Inc.
2701 Lucent Lane, Rm. 9F-546, Lisle, Illinois 60532 (USA)

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