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[Bug 1444162] Re: IPv6 default route present on ccmni0, even though no address assigned

 

Note.

Just removing the rote does not fix the problem on QNetwork since it
checks for nm connection properties.

GENERAL.DEFAULT:                        no
GENERAL.DEFAULT6:                       yes

To fix that, the nm should not set the gsm connection as default for
IPV6.

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

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

Status in network-manager package in Ubuntu:
  Confirmed

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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