[e2e] ICMP & TCP segments with IP ID = 0?

Andi Kleen ak at muc.de
Wed May 16 10:57:32 PDT 2001

On Wed, May 16, 2001 at 06:24:11PM +0200, Craig Partridge wrote:
> But RFC 791 is quite clear:
>     The originating protocol module of
>     an internet datagram sets the identification field to a value that  
>     must be unique for that source-destination pair and protocol for the
>     time the datagram will be active in the internet system.
> So while 0 is a valid value, you can't repeat it for the lifetime of
> a datagram or so (RFC 1122 permits reuse in the narrow case of retransmitting
> exactly the same data).

That's clearly an impossible to follow statement, except if you limit
send rate to a single destination to 65536 packets every MSL. I don't think
you will find any stack that follows that ;)


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