I was looking through my syslog and saw a bunch of records that seem to indicate IPv6 being on.  In my settings I have it set to IPv4 only, so I was wondering whats causing those messages to come up.  Diags attached

 

example of messages

Dec  8 16:37:58 Tower avahi-daemon[17573]: Interface vethcf88fad.IPv6 no longer relevant for mDNS.
Dec  8 16:37:58 Tower avahi-daemon[17573]: Leaving mDNS multicast group on interface vethcf88fad.IPv6 with address fe80::1848:5eff:fe94:4be2.
Dec  8 16:37:58 Tower kernel: docker0: port 2(vethcf88fad) entered disabled state
Dec  8 16:37:58 Tower kernel: device vethcf88fad left promiscuous mode
Dec  8 16:37:58 Tower kernel: docker0: port 2(vethcf88fad) entered disabled state
Dec  8 16:37:58 Tower avahi-daemon[17573]: Withdrawing address record for fe80::1848:5eff:fe94:4be2 on vethcf88fad.
Dec  8 16:38:00 Tower kernel: docker0: port 2(veth631ea02) entered blocking state
Dec  8 16:38:00 Tower kernel: docker0: port 2(veth631ea02) entered disabled state
Dec  8 16:38:00 Tower kernel: device veth631ea02 entered promiscuous mode
Dec  8 16:38:00 Tower kernel: IPv6: ADDRCONF(NETDEV_UP): veth631ea02: link is not ready
Dec  8 16:38:00 Tower kernel: docker0: port 2(veth631ea02) entered blocking state
Dec  8 16:38:00 Tower kernel: docker0: port 2(veth631ea02) entered forwarding state
Dec  8 16:38:00 Tower kernel: eth0: renamed from veth1cdc40a
Dec  8 16:38:00 Tower kernel: IPv6: ADDRCONF(NETDEV_CHANGE): veth631ea02: link becomes ready
Dec  8 16:38:01 Tower avahi-daemon[17573]: Joining mDNS multicast group on interface veth631ea02.IPv6 with address fe80::2c15:63ff:fe58:2a29.
Dec  8 16:38:01 Tower avahi-daemon[17573]: New relevant interface veth631ea02.IPv6 for mDNS.
Dec  8 16:38:01 Tower avahi-daemon[17573]: Registering new address record for fe80::2c15:63ff:fe58:2a29 on veth631ea02.*.

 

tower-diagnostics-20171208-1759.zip

That's normal. All interfaces get an IPv6 link local address, even when not used.