[Bug 988183] Re: Logs full with "ICMPv6 RA: ndisc_router_discovery() failed to add default route"

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** Tags added: patch

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Title:
  Logs full with "ICMPv6 RA: ndisc_router_discovery() failed to add
  default route"

Status in “network-manager” package in Ubuntu:
  New

Bug description:
  Hi,

  I am observing a lot of "ICMPv6 RA: ndisc_router_discovery() failed to add default route" in my logs.
  After a fresh reboot:

  $ dmesg | grep "ICMPv6 RA: ndisc_router_discovery() failed to add default route." | wc -l
  46

  First, I thought this is a kernel issue, but than I found a bug-report
  in the Red Hat BTS in [1].

  Just FYI: I am on Linux-3.4-rc4 - with the original Ubuntu/precise
  kernel I haven't seen this which is linux-image-3.2.0-23-generic
  (3.2.0-23.36).

  - Sedat -

  [1] https://bugzilla.redhat.com/show_bug.cgi?id=785772

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: network-manager 0.9.4.0-0ubuntu3
  Uname: Linux 3.4.0-rc4-4-generic x86_64
  ApportVersion: 2.0.1-0ubuntu5
  Architecture: amd64
  Date: Wed Apr 25 08:40:50 2012
  ExecutablePath: /usr/sbin/NetworkManager
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
  IpRoute:
   default via 192.168.178.1 dev wlan0  proto static 
   169.254.0.0/16 dev wlan0  scope link  metric 1000 
   192.168.178.0/24 dev wlan0  proto kernel  scope link  src 192.168.178.22  metric 2
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
  SourcePackage: network-manager
  UpgradeStatus: No upgrade log present (probably fresh install)
  nmcli-con:
   NAME                      UUID                                   TYPE              TIMESTAMP    TIMESTAMP-REAL                     AUTOCONNECT   READONLY   DBUS-PATH                                 
   myCastle-WLAN WPA (Wireless LAN) a74880ae-a336-4133-9454-b0376557cb6c   802-11-wireless   1335335775   Mi 25 Apr 2012 08:36:15 CEST       yes           no         /org/freedesktop/NetworkManager/Settings/0
  nmcli-dev:
   DEVICE     TYPE              STATE         DBUS-PATH                                  
   eth0       802-3-ethernet    unmanaged     /org/freedesktop/NetworkManager/Devices/1  
   wlan0      802-11-wireless   connected     /org/freedesktop/NetworkManager/Devices/0
  nmcli-nm:
   RUNNING         VERSION    STATE           NET-ENABLED   WIFI-HARDWARE   WIFI       WWAN-HARDWARE   WWAN      
   running         0.9.4.0    connected       enabled       enabled         enabled    enabled         enabled

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