Re: periodic network disconnects (reason 'ip-config-unavailable')

[Dan Williams <dcbw redhat com>]

On Sat, 2013-04-27 at 13:56 -0400, Chuck Anderson wrote:
> On Fedora 18, I'm seeing periodic network disconnects with these
> messages in the log:
>
> Apr 27 11:01:11 a NetworkManager[833]: <info> (wlan0): device state change: activated -> failed (reason 
> 'ip-config-unavailable') [100 120 5]
> Apr 27 11:01:11 a NetworkManager[833]: <warn> Activation (wlan0) failed for connection 'Sanctuary 2.4GHz'
> Apr 27 11:01:11 a NetworkManager[833]: <info> (wlan0): device state change: failed -> disconnected (reason 
> 'none') [120 30 0]
> Apr 27 11:01:11 a NetworkManager[833]: <info> (wlan0): deactivating device (reason 'none') [0]
> Apr 27 11:01:11 a dbus-daemon[736]: dbus[736]: [system] Activating service 
> name='org.freedesktop.nm_dispatcher' (using servicehelper)
>
> What does reason 'ip-config-unavailable' mean and how can I
> troubleshoot what is happening here?
>
> I do have IPv6 on this network and found this bug report, but that
> appears to be for an older version and should be fixed in the version
> in Fedora 18, NetworkManager-0.9.8.1-1.git20130327.fc18.x86_64:

What are the messages just before that?  Is it IPv6 that's timing out?
There should be some log messages about that.  You can also run NM with
verbose IPv6 logging which might tell us more about what's going on.  So
for now I'll suspect IPv6, and the issues there are that the router may
not send advertisements quickly enough to prevent timed-out DNS servers.

sudo dbus-send --system --print-reply
--dest=org.freedesktop.NetworkManager /org/freedesktop/NetworkManager
org.freedesktop.NetworkManager.SetLogging string:"debug" string:""

grab the syslog output from that during a failure, then we'll see what
the actual issue is and how to deal with it.

Dan