In message <200503111902.j2BJ2pRv009252@ylpvm01.prodigy.net>Jeffrey Hsu writes
>  > what do the adapters do for ip_id?
>
>They increment it by one for each segment they generate.

[...]

... Yep, which is one of the reasons ip_randomid() must die.

Or at least, be made {compile|config}-time exclusive with TSO, or
large send, or whatever we're calling it.