[Pkg-utopia-maintainers] Bug#668885: network-manager: change action when RDNSS expires

[Philipp Kern]

Package: network-manager
Version: 0.9.4.0-6
Followup-For: Bug #668885
Control: severity -1 important

I think this warrants fixing. I'd even argue that the severity is higher
than important.

To sum up:

Jan 19 13:26:35 spike NetworkManager[4083]: <debug> [1358598395.547836] [nm-ip6-manager.c:277] rdnss_expired(): (wlan0): IPv6 RDNSS information expired
Jan 19 13:26:35 spike NetworkManager[4083]: <debug> [1358598395.547910] [nm-ip6-manager.c:312] set_rdnss_timeout(): (wlan0): removing expired RA-provided nameserver fe80::4ee6:76ff:fe51:ae30
Jan 19 13:26:35 spike NetworkManager[4083]: <info> (wlan0): device state change: activated -> failed (reason 'ip-config-unavailable') [100 120 5]
Jan 19 13:26:35 spike NetworkManager[4083]: <warn> Activation (wlan0) failed for access point (Pigeon_A)
Jan 19 13:26:35 spike NetworkManager[4083]: <warn> Activation (wlan0) failed.

* When your network is configured to send RDNSS information (which is
  now passed to network-manager due to a recent kernel change), then
  network-manager will flap the *link* when this information expires.
* Network upstream configuration can often not be influenced, even
  though the workaround seems to be to ignore RFC advise and set a
  higher timeout for RDNSS.
* This affects both IPv4 and IPv6 connectivity, in the case of
  wireless the link is killed ("disconnected" event) and reestablished.
  I can imagine the same happening on wired links, possibly paying
  the STP timeout on the switch port.

The same issue is also listed in the RH bugzilla:
https://bugzilla.redhat.com/show_bug.cgi?id=753482

It references a commit that applies a hack, although it's entirely unclear
to me why n-m sees the need to flap the whole link when some DNS server
information expires, this seems crazy.

http://git.pavlix.net/gitweb/?p=NetworkManager.git;a=commitdiff;h=62f135d519fadd883cf72e0cd67f35269bae1d57;hp=9bf3c01e27f865cb93ed5115ed9c2ac260b53ecc

Kind regards
Philipp Kern

-- System Information:
Debian Release: 7.0
  APT prefers testing
  APT policy: (500, 'testing'), (300, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages network-manager depends on:
ii  adduser                3.113+nmu3
ii  dbus                   1.6.8-1
ii  dpkg                   1.16.9
ii  isc-dhcp-client        4.2.4-4
ii  libc6                  2.13-37
ii  libdbus-1-3            1.6.8-1
ii  libdbus-glib-1-2       0.100-1
ii  libgcrypt11            1.5.0-3
ii  libglib2.0-0           2.33.12+really2.32.4-3
ii  libgnutls26            2.12.20-2
ii  libgudev-1.0-0         175-7
ii  libnl-3-200            3.2.7-4
ii  libnl-genl-3-200       3.2.7-4
ii  libnl-route-3-200      3.2.7-4
ii  libnm-glib4            0.9.4.0-6
ii  libnm-util2            0.9.4.0-6
ii  libpolkit-gobject-1-0  0.105-3
ii  libuuid1               2.20.1-5.3
ii  lsb-base               4.1+Debian8
ii  udev                   175-7
ii  wpasupplicant          1.0-3+b2

Versions of packages network-manager recommends:
ii  crda          1.1.2-1
ii  dnsmasq-base  2.62-3
ii  iptables      1.4.14-3
ii  modemmanager  0.5.2.0-2
ii  policykit-1   0.105-3
ii  ppp           2.4.5-5.1+b1

Versions of packages network-manager suggests:
ii  avahi-autoipd  0.6.31-1

-- no debconf information