[Bug 1586528] Re: Avahi-daemon withdraws address record

[Chuck Hawley]

Same symptoms, same result on a headless always-on box running 16.04.
Made worse by the fact that I have to hard-power off the box and hook it
up to monitor for troubleshooting.  Every couple weeks the machine will
lose connection to the network.

Last time I thought I lost the on-board NIC and went and
bought/installed a new NIC card  (another Realtek).  Two weeks later,
same result:  syslog shows this:

May 24 22:40:14 phaedrus avahi-daemon[857]: Withdrawing address record for 192.168.0.201 on enp4s1.
May 24 22:40:14 phaedrus avahi-daemon[857]: Leaving mDNS multicast group on interface enp4s1.IPv4 with address 192.168.0.201.
May 24 22:40:14 phaedrus avahi-daemon[857]: Interface enp4s1.IPv4 no longer relevant for mDNS.

## System:

Host: phaedrus Kernel: 4.4.0-78-generic x86_64 (64 bit) Console: tty 9 Distro: Ubuntu 16.04 xenial
	
## Network: (from `inxi -F`)

Card-1: Device 000c:d051
IF: N/A state: N/A speed: N/A duplex: N/A mac: N/A
Card-2: Realtek RTL8169 PCI Gigabit Ethernet Controller driver: r8169
IF: enp4s1 state: up speed: 1000 Mbps duplex: full mac: 00:0a:cd:2c:93:5f

Looks like it might be Realtek 8168/9 related?

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https://bugs.launchpad.net/bugs/1586528

Title:
  Avahi-daemon withdraws address record

Status in avahi package in Ubuntu:
  Invalid
Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  For some reason, if I leave my Ubuntu VM up for a prolonged period of
  time the machine will lose connection to the network.  ip addr shows
  that the nic port no longer has an address and an examination of the
  syslog shows this:

  May 27 14:19:38 matt-VirtualBox avahi-daemon[590]: Withdrawing address record for 10.0.2.15 on enp0s3.
  May 27 14:19:38 matt-VirtualBox avahi-daemon[590]: Leaving mDNS multicast group on interface enp0s3.IPv4 with address 10.0.2.15.
  May 27 14:19:38 matt-VirtualBox avahi-daemon[590]: Interface enp0s3.IPv4 no longer relevant for mDNS.

  
  for no known reason.

  The only reliable way to get the network to come back (that I have
  found) is a full reboot.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: avahi-daemon 0.6.32~rc+dfsg-1ubuntu2
  ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
  Uname: Linux 4.4.0-22-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri May 27 15:11:34 2016
  InstallationDate: Installed on 2015-10-22 (218 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  SourcePackage: avahi
  UpgradeStatus: Upgraded to xenial on 2016-03-30 (58 days ago)

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