In article <20050413214336.GA25204@colwyn.zhadum.de>,
	Matthias Scheler <tron@zhadum.de> writes:
>> If it were up to me, I'd simply back out this ``optimization':
> Yes, that should be done unless somebody comes up with a fix. As it is
> it will make NetBSD's network appear unreliable because it is hard
> to figure what is causing such problems.

I've submitted a PR now:

PR kern/29971: Loopback checksum optimizations cause UDP problems

	Kind regards

-- 
Matthias Scheler                                  http://scheler.de/~matthias/