I believe that this happens because the config (/proc/sys/net/ipv6/conf/all/accept_ra_defrtr) says to accept a default route, and you have one specified in /etc/network/interfaces, and therefore the advertised default route fails to get added to the routing table.
It would be a good thing if the logged error (1) said what it was trying to add as the default route, and (2) was rate limited, and (3) pointed at accept_ra_defrtr Having ifup turn off accept_ra_defrtr when it adds a default route might be a good thing, too. Just my thoughts. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1065974 Title: dmesg full of "ICMPv6 RA: ndisc_router_discovery() failed to add default route" Status in linux package in Ubuntu: Confirmed Bug description: I am using Ubuntu Server 12.04.1 LTS and since IPv6 RAs are enabled on wired connection, the message "ICMPv6 RA: ndisc_router_discovery() failed to add default route" fills dmesg. The default route is being set nontheless: 2001:638:a000:4104::/64 dev eth0 proto kernel metric 256 fe80::/64 dev eth0 proto kernel metric 256 default via fe80::1 dev eth0 metric 1024 /etc/network/interfaces looks like this: # The primary network interface auto eth0 iface eth0 inet static address 131.188.31.189 netmask 255.255.255.0 gateway 131.188.31.1 dns-nameservers 131.188.0.11 131.188.0.10 dns-domain informatik.uni-erlangen.de dns-search informatik.uni-erlangen.de iface eth0 inet6 static address 2001:638:a000:4104::189 netmask 64 gateway fe80::1 dns-nameservers 2001:638:a000:1053:53::1 2001:638:a000:1053:53::2 NetworkManager is not installed, so I don't think its a dublicate of #988183 ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-31-virtual 3.2.0-31.50 ProcVersionSignature: Ubuntu 3.2.0-31.50-virtual 3.2.28 Uname: Linux 3.2.0-31-virtual x86_64 AlsaDevices: total 0 crw-rw---T 1 root audio 116, 1 Okt 4 23:10 seq crw-rw---T 1 root audio 116, 33 Okt 4 23:10 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.0.1-0ubuntu13 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory Date: Fri Oct 12 15:12:44 2012 HibernationDevice: RESUME=UUID=f3f34eb5-dc4d-47b9-b67e-6938afa8a07a InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64 (20120424.1) IwConfig: lo no wireless extensions. eth0 no wireless extensions. Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd MachineType: Bochs Bochs PciMultimedia: ProcEnviron: TERM=xterm-256color LANG=de_DE.UTF-8 SHELL=/bin/bash ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-31-virtual root=UUID=07c76f05-3330-4c30-b1f5-488a08024a0d ro ProcModules: floppy 70365 0 - Live 0x0000000000000000 lp 17799 0 - Live 0x0000000000000000 parport 46562 1 lp, Live 0x0000000000000000 psmouse 97362 0 - Live 0x0000000000000000 serio_raw 13211 0 - Live 0x0000000000000000 RelatedPackageVersions: linux-restricted-modules-3.2.0-31-virtual N/A linux-backports-modules-3.2.0-31-virtual N/A linux-firmware 1.79.1 RfKill: Error: [Errno 2] No such file or directory SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/01/2007 dmi.bios.vendor: Bochs dmi.bios.version: Bochs dmi.chassis.type: 1 dmi.chassis.vendor: Bochs dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr: dmi.product.name: Bochs dmi.sys.vendor: Bochs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1065974/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
