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Re: [tcpm] Re: WGLC: comments on 2581bis

John Heffner <jheffner@psc.edu> Tue, 04 December 2007 21:59 UTC

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Date: Tue, 04 Dec 2007 16:59:04 -0500
From: John Heffner <jheffner@psc.edu>
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Subject: Re: [tcpm] Re: WGLC: comments on 2581bis
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Mark Allman wrote:
> Gorry-
>> - Is the default RMSS still 536 bytes also for IPv6, since [RFC1122]
>> does not apply in this context to IPv6.
> 
> I think so.  Are you suggesting here that we specify a different value
> when we're going over IPv6?  I am not sure if that is a 2581bis thing or
> a 1122bis thing.

In principle, the TCP's MSS may be independent of MTU, even though in 
most reasonable implementations it's going to be at least as large 
(minus headers).  I think 536 applies to IPv6 as well.  Linux uses this 
value hard-coded for both IPv4 and IPv6.

   -John


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