[Bug 610391] Re: UDP checksum offload breaks DHCP on virtual machines
Neil Wilson
neil at aldur.co.uk
Fri Sep 2 11:56:54 UTC 2011
Another thread from SUSE.
https://bugzilla.novell.com/show_bug.cgi?id=668194
** Bug watch added: Novell/SUSE Bugzilla #668194
https://bugzilla.novell.com/show_bug.cgi?id=668194
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https://bugs.launchpad.net/bugs/610391
Title:
UDP checksum offload breaks DHCP on virtual machines
Status in The Linux Kernel:
Unknown
Status in “isc-dhcp” package in Ubuntu:
New
Status in “linux” package in Ubuntu:
New
Bug description:
When running an Ubuntu server on RHEL6 the dhclient on Ubuntu will
report 'bad udp checksum' in response to the DHCP Offer packets coming
from the Host.
This is on a libvirt controlled KVM system using libvirt controlled
dnsmasq processes on the Host.
Optimisations within the kernel appear to be upsetting dhclient.
http://www.pubbs.net/201004/dhcp/30492-dhcpd-problem-on-virtual-
machines.html
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-24-generic-pae (not installed)
Regression: Yes
Reproducible: Yes
ProcVersionSignature: User Name 2.6.32-24.38-generic-pae 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic-pae i686
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access /dev/snd/: No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory
Architecture: i386
ArecordDevices: Error: [Errno 2] No such file or directory
CurrentDmesg:
[ 13.240032] eth0: no IPv6 routers present
[ 2868.734972] psmouse.c: Explorer Mouse at isa0060/serio1/input0 lost synchronization, throwing 1 bytes away.
Date: Tue Jul 27 09:33:31 2010
Lspci: Error: [Errno 2] No such file or directory
Lsusb: Error: [Errno 2] No such file or directory
MachineType: Red Hat KVM
PciMultimedia:
ProcCmdLine: root=UUID=129537b3-af8e-4e06-bd9d-06626fa40823 ro quiet splash
ProcEnviron:
LANG=en_GB.UTF-8
SHELL=/bin/bash
SourcePackage: linux
dmi.bios.date: 01/01/2007
dmi.bios.vendor: Seabios
dmi.bios.version: 0.5.1
dmi.chassis.type: 1
dmi.chassis.vendor: Red Hat
dmi.modalias: dmi:bvnSeabios:bvr0.5.1:bd01/01/2007:svnRedHat:pnKVM:pvrRHEL6.0.0PC:cvnRedHat:ct1:cvr:
dmi.product.name: KVM
dmi.product.version: RHEL 6.0.0 PC
dmi.sys.vendor: Red Hat
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