Subject: RE: [manet] some thoughts on DPD

From: "Dearlove, Christopher \(UK\)" <[email-masked]>
Date: Mon, 21 May 2007 13:36:30 +0100

[Teco] 
I think RFC791 shall take precedence over new ideas. So ip_id shall be
unique for srce, dest, proto and fragment offset as already specified in
RFC791. Why deviate from RFC791 when it is not needed?

Caveat: This is not an area I'm an expert in. And I may
have missed the point of the discussion. But if I have
I'm sure I'll learn something from the corrections.

My understanding was that more important than either is
what already happens in practice - millions of IP stacks
are not going to be rewritten for the benefit of MANETs.
And here as I understand it, behaviour varies. A Google
search on the subject threw up as an early hit

http://www.mit.edu/~rbeverly/papers/tcpclass-pam04.pdf

which isn't the original source of my understanding, but
has some comments about NATs interfering with IP IDs
that may be relevant, as well as other interesting
material. Final caveat: I've only skimmed it at this
time.

(In case it helps: my search was "ip id uniqueness"
- without the quotes. This was the third hit, and the
only one I've looked at.)

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