Subject: kern/25359: bge0 + hw checksum (+ip4csum, +udp4csum) + udp + fragments FAILS
To: None <>
From: Frank Kardel <>
List: netbsd-bugs
Date: 04/28/2004 09:00:28
>Number:         25359
>Category:       kern
>Synopsis:       bge0 + hw checksum (+ip4csum, +udp4csum) + udp + fragments FAILS
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Apr 28 07:01:00 UTC 2004
>Originator:     Frank Kardel
>Release:        NetBSD 2.0C
System: NetBSD Orcus 2.0C NetBSD 2.0C (ORCUS32) #0: Tue Apr 20 16:30:11 CEST 2004  kardel@Orcus:/usr/src/sys/arch/i386/compile/ORCUS32 i386
Architecture: i386
Machine: i386
	When running a bge0 (Braoadcom 5705) with hw checksup enabled and
	udp NFS client traffic a lot of timed out fragments can be observed.
	disabling hw checksum gets things flowing again. Is this possibly a bug
	with hw checksum / udp / fragments ?
	Linux client with NFS udp mounts. bge0 with ip4csum udp4csum tcp4csum.
	Attempt to use NFS and wait... - see fragments time out in NetBSD2.0C
	machine with bge0 and hw checksumming.