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** Branch linked: lp:~network-manager/network-manager/ubuntu

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https://bugs.launchpad.net/bugs/1444162

Title:
  IPv6 default route present on ccmni0, even though no address assigned

Status in Canonical System Image:
  New
Status in network-manager package in Ubuntu:
  In Progress

Bug description:
  $ system-image-cli -i
  current build number: 171
  device name: m75
  channel: ubuntu-touch/vivid-proposed
  last update: 2015-04-14 22:23:10
  version version: 171

  Upon boot, my v6 routes include a default via ccmni0:
  $ ip -6 route
  fe80::/64 dev wlan0  proto kernel  metric 256 
  default dev ccmni0  proto static  metric 1024 

  Even though there's no v6 address on the device:
  $ ip -6 addr
  1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 
      inet6 ::1/128 scope host 
         valid_lft forever preferred_lft forever
  10: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
      inet6 fe80::3abc:1aff:fe18:b68b/64 scope link 
         valid_lft forever preferred_lft forever

  This means that hosts that have v6 addresses are tried to be reached via v6, which obviously fails:
  > 29% [Connecting to ports.ubuntu.com (2001:67c:1360:8001::18)]

  Toggling GSM data loses the default route:

  $ ip -6 route  
  fe80::/64 dev wlan0  proto kernel  metric 256

  And the connection succeeds via v4.

  Attached find a set of logs from network-test-session.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: network-manager 0.9.10.0-4ubuntu13
  Uname: Linux 3.10.35+ armv7l
  ApportVersion: 2.17-0ubuntu2
  Architecture: armhf
  CRDA: Error: [Errno 2] No such file or directory: 'iw'
  Date: Tue Apr 14 23:45:11 2015
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   # Include files from /etc/network/interfaces.d:
   source-directory /etc/network/interfaces.d
  InstallationDate: Installed on 2015-04-14 (0 days ago)
  InstallationMedia: Ubuntu Vivid Vervet (development branch) - armhf (20150414-020204)
  IpRoute:
   default via 10.2.0.254 dev wlan0  proto static  metric 1024 
   10.0.0.0/8 via 10.2.0.1 dev wlan0  proto dhcp  metric 10 
   10.2.0.0/24 dev wlan0  proto kernel  scope link  src 10.2.0.66
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  PciNetwork:
   
  SourcePackage: network-manager
  SystemImageInfo:
   current build number: 171
   device name: m75
   channel: ubuntu-touch/vivid-proposed
   last update: 2015-04-14 22:23:10
   version version: 171
  UpgradeStatus: No upgrade log present (probably fresh install)
  mtime.conffile..etc.dbus.1.system.d.org.freedesktop.NetworkManager.conf: 2015-04-14T04:33:56
  nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'.

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