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Re: Path MTU Discovery
--- On Mon, 10 Feb 1997 23:02:35 -0500 "Angelos D. Keromytis" <angelos@AURORA.CIS.UPENN.EDU> wrote:
> I think that, if not mandate copying the DF bit, the new drafts should
> at least present the benefits of doing so and provide guidelines to
> anyone who wants to have his implementation allow PathMTU. Or it could
> be a separate document altogether.
If one treats the outer IP/ESP as a link-layer, then not copying the DF bit
does not break Path MTU Discovery. The MTU of the IPsec tunnel is defined
by the IPsec implementation at present.
In any event, I think it would be useful for the next set of drafts to
be clear on this matter. I'm personally indifferent about what the final
result is.
Ran
rja@inet.org
speaking only for himself
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