Public bug reported: 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 ** Affects: linux Importance: Unknown Status: Unknown ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 lucid needs-upstream-testing networking regression-release -- UDP checksum offload breaks DHCP on virtual machines https://bugs.launchpad.net/bugs/610391 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
