[avahi] Avahi on Fedora 21

Trent Lloyd lathiat at bur.st
Sun Nov 30 20:46:02 PST 2014

Hi Robert,

The most common cause of this issue is that the network driver is not correctly handling multicast.

Can you please try one of these two things and let me know if it resolves the issue.  Replace ‘eth0’ with your relevant interface:

(1) Leave tcpdump running (goes into promiscuous mode, and thus, all multicast packets are received, even if the network driver is broken)
tcpdump -ni eth0

(2) Enable the ‘all multicast’ flag:
ifconfig eth0 allmulti


> On 29 Nov 2014, at 12:28 pm, Robert M. Albrecht <lists at romal.org> wrote:
> i,
> I'm running Avahi on a Fedora 20 to announce some printers to OSX boxes. I do this for 2-3 years and never had any problems.
> I now upgraded the system to Fedora 21 and something strange happens.
> Avahi announces the services perfectly. After some time (1-3 hours) the OSX do not see the printer accouncements anymore.
> If I do a
> avahi-browse -a
> the services reappear. Restarting the service does help. ps tells me, the daemon is running.
> I appended a debug switch, but there is nothing strange to be found in syslog.
> [Unit]
> Description=Avahi mDNS/DNS-SD Stack
> Requires=avahi-daemon.socket
> [Service]
> Type=dbus
> BusName=org.freedesktop.Avahi
> ExecStart=/usr/sbin/avahi-daemon -s --debug
> ExecReload=/usr/sbin/avahi-daemon -r
> NotifyAccess=main
> [Install]
> WantedBy=multi-user.target
> Also=avahi-daemon.socket
> Alias=dbus-org.freedesktop.Avahi.service
> Any ideas how to debug this ? Where to look ?
> Regards,
> Robert
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> avahi at lists.freedesktop.org
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