(SOLVED!) Re: Auto network reconfiguring causes DNS lookup to fail

Summary: purging avahi-daemon appears to have resolved
the issue.

On Sun, Nov 13, 2011 at 11:28:28PM +0000, Brian wrote:
On Sun 13 Nov 2011 at 12:07:47 -1000, Joel Roth wrote:

On Sun, Nov 13, 2011 at 05:13:54PM +0000, Brian wrote:
May we see the output of ifconfig and your interfaces file in
/etc/network?

auto lo
iface lo inet loopback

This isn't the sum total of /etc/network/interfaces, is it? Where is
wlan0?

Since that advent of udev, I notice that not all network
devices start at 0. For instance, I have only one ethernet
interface, eth1. And only one wireless interface, wlan1.

Do you use avahi for anything?

Not that I know of. I never deliberately installed it;
it got pulled in during an upgrade.

You could stick with the situation you have now and solve the problem in
that context, or revert to what was, presumably, a working situation. It
is highly unlikely you will miss the benefits of avahi. So

apt-get purge avahi-daemon

Does anything complain?

I see it is used for LAN printer discovery. I stopped the
avahi-daemon just now, but I still see that eth1 and
eth1:avahi have popped back into the ifconfig listing.

(I'm not sure if that has anything to do with my connectivity
problem, but I have also noticed that DNS lookups take *much*
longer if the routing table has entries for unconnected
network interfaces.)

Funny, I thought

/etc/init.d/avahi-daemon stop

should be enough to shutdown whatever avahi was doing,
but, ps ax | grep avahi:

28687 ? S 0:00 avahi-autoipd: [eth1] bound 169.254.11.90
28688 ? S 0:00 avahi-autoipd: [eth1] callout dispatcher
28745 ? S 0:00 avahi-autoipd: [wlan1] sleeping
28746 ? S 0:00 avahi-autoipd: [wlan1] callout dispatcher

That goes against the grain of what "stopping" a service
means to me. Perhaps that deserves a bug report.

And having killed these processes. I see they have started
up again.

Having purged avahi, these processes are still starting up. I
guess a reboot is in order.

Having rebooted, my networking is working normally again.
Yay! What a relief. Thanks, Brian!!


--
Joel Roth


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