Bug 153244

Summary:	[em] em(4) fails to send UDP to port 0xffff
Product:	Base System	Reporter:	danny
Component:	kern	Assignee:	freebsd-net (Nobody) <net>
Status:	Closed Unable to Reproduce
Severity:	Affects Only Me	CC:	sbruno
Priority:	Normal	Keywords:	IntelNetworking
Version:	8.1-STABLE
Hardware:	Any
OS:	Any

Description danny 2010-12-17 10:20:06 UTC

	with TXCSUM on, the em failes to send a UDP packet to port (short)-1 (0xffff)

Fix: 

workaround: ifconfig em0 -txcsum
How-To-Repeat: 	nc -u some-host 65535
	and watch via wireshark

Comment 1 Mark Linimon freebsd_committer

2010-12-20 08:43:36 UTC

Responsible Changed
From-To: freebsd-bugs->freebsd-net

Over to maintainer(s).

Comment 2 Sean Bruno freebsd_committer

2015-08-04 16:11:38 UTC

I've fired off this exact test on my 82574L based host (em) and it works for me.