Public bug reported:
My main interface eth0 fails to bring up its IPv6 global address - despite
having done so on Ubuntu 9.04. We have been running IPv6 for a few years
without problem here. The interface has a link local address and sends out an
RA to do DAD but the kernel (wrongly) seems to assume there has been a
duplicate address detected and does not assign the address to the interface.
This can been seen by looking in the /var/log/messages where there are copious
messages:
Nov 13 15:10:47 ballard kernel: [ 1251.856114] eth0: IPv6 duplicate address
detected!
My current workaround to disbale DAD by doing the following:
root# echo '0' > /proc/sys/net/ipv6/conf/eth0/accept_dad
ProblemType: Bug
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: AMD8111 [AMD AMD8111], device 0: Intel ICH [AMD AMD8111]
Subdevices: 1/1
Subdevice #0: subdevice #0
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: piers 2848 F.... pulseaudio
/dev/snd/controlC1: piers 2848 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'AMD8111'/'AMD AMD8111 with ALC655 at irq 17'
Mixer name : 'Realtek ALC655 rev 0'
Components : 'AC97a:414c4760'
Controls : 41
Simple ctrls : 26
Card1.Amixer.info:
Card hw:1 'U0x46d0x8ca'/'USB Device 0x46d:0x8ca at usb-0000:01:03.2-3.3, high
speed'
Mixer name : 'USB Mixer'
Components : 'USB046d:08ca'
Controls : 2
Simple ctrls : 1
Card1.Amixer.values:
Simple mixer control 'Mic',0
Capabilities: cvolume cvolume-joined cswitch cswitch-joined
Capture channels: Mono
Limits: Capture 0 - 3072
Mono: Capture 0 [0%] [18.00dB] [on]
Date: Fri Nov 13 15:23:15 2009
DistroRelease: Ubuntu 9.10
HibernationDevice: RESUME=UUID=d74a1f12-7645-4e7f-af80-a686e39da483
MachineType: Sun Microsystems W1100z/2100z
NonfreeKernelModules: nvidia
Package: linux-image-2.6.31-15-generic 2.6.31-15.50
ProcCmdLine: root=UUID=8d4be6f5-8040-4dd5-b4bc-58676a6c0af7 ro splash vga=795
ProcEnviron:
PATH=(custom, no user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-15.50-generic
RelatedPackageVersions:
linux-backports-modules-2.6.31-15-generic N/A
linux-firmware 1.25
RfKill:
SourcePackage: linux
Uname: Linux 2.6.31-15-generic i686
WpaSupplicantLog:
dmi.bios.date: 09/29/2006
dmi.bios.vendor: Sun Microsystems
dmi.bios.version: R01-B5 S1
dmi.board.name: K85AE
dmi.board.vendor: Sun Microsystems
dmi.board.version: 501-6851
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 7
dmi.chassis.vendor: Sun Microsystems
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnSunMicrosystems:bvrR01-B5S1:bd09/29/2006:svnSunMicrosystems:pnW1100z/2100z:pvr602-2836-02:rvnSunMicrosystems:rnK85AE:rvr501-6851:cvnSunMicrosystems:ct7:cvrN/A:
dmi.product.name: W1100z/2100z
dmi.product.version: 602-2836-02
dmi.sys.vendor: Sun Microsystems
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386
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IPv6 Global address fails to come up due to DAD failure
https://bugs.launchpad.net/bugs/482181
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