ipid-debuggery (was Re: [e2e] ICMP & TCP segments with IP ID = 0?
F.Potorti at cnuce.cnr.it
Thu May 17 05:28:02 PDT 2001
The interesting question is what status do such efforts have. If they
make use of a feature in the protocol that everyone is supposed to
implement, and use that feature for a purpose beyond that which the
protocol architects intended is that (a) wrong; (b) a second-class
usage [e.g., they can't complain if people don't implement the feature]; or
(c) a use of the protocol entitled to equal credence with work done before?
An IP ID of 0 is legal as any other value.
Incrementing IP ID when DF is set is not mandated by any document, as
far as I know, and not even recommended.
If the architect of an IP layer can nonetheless increment it without too
much effort, that is a good think, because it turns out to be useful in
debugging, tracing, measuring, experimenting.
Francesco Potortì (researcher) Voice: +39 050 315 3058 (op.2111)
Area della ricerca CNR - CNUCE Fax: +39 050 313 8091
via Alfieri 1, I-56010 Ghezzano, Pisa Email: F.Potorti at cnuce.cnr.it
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