Hi Ramesh,
Please could you post some example daemon.log entries and any surrounding
entries that seem related?
Also is there anything in
/var/log/syslog
that seems to relate?
Perhaps
$ sudo cat /var/log/syslog | grep x
where x = the interface name concerned.
Thanks,
Gareth
Hi Gareth,
This is what I find in daemon.log
Jul 12 18:27:16 new-yoda avahi-daemon[441]: Withdrawing address record
for fe80::daeb:97ff:febf:5ad0 on enxd8eb97bf5ad0.
Jul 12 18:27:16 new-yoda avahi-daemon[441]: Withdrawing address record
for 192.168.1.124 on enxd8eb97bf5ad0.
After this happens, most of my net access goes down. Firefox cannot get
to google.com/youtube.com. DNS lookup also returns nothing for external
hosts. I see similar messages on /var/log/syslog also
Jul 12 18:27:16 new-yoda avahi-daemon[441]: Interface
enxd8eb97bf5ad0.IPv6 no longer relevant for mDNS.
Jul 12 18:27:16 new-yoda avahi-daemon[441]: Leaving mDNS multicast
group on interface enxd8eb97bf5ad0.IPv6 with address
fe80::daeb:97ff:febf:5ad0.
Jul 12 18:27:16 new-yoda dhclient[550]: receive_packet failed on
enxd8eb97bf5ad0: Network is down
Jul 12 18:27:16 new-yoda avahi-daemon[441]: Interface
enxd8eb97bf5ad0.IPv4 no longer relevant for mDNS.
Jul 12 18:27:16 new-yoda avahi-daemon[441]: Leaving mDNS multicast
group on interface enxd8eb97bf5ad0.IPv4 with address 192.168.1.124.
Jul 12 18:27:16 new-yoda avahi-daemon[441]: Withdrawing address
record for fe80::daeb:97ff:febf:5ad0 on enxd8eb97bf5ad0.
Jul 12 18:27:16 new-yoda avahi-daemon[441]: Withdrawing address
record for 192.168.1.124 on enxd8eb97bf5ad0.
Jul 12 18:27:17 new-yoda kernel: [ 8560.412306] asix 1-1:1.0 eth0:
register 'asix' at usb-0000:00:14.0-1, ASIX AX88772 USB 2.0 Ethernet,
d8:eb:97:bf:5a:d0
Jul 12 18:27:17 new-yoda NetworkManager[448]: <info> [1657668437.0609]
manager: (eth0): new Ethernet device
(/org/freedesktop/NetworkManager/Devices/6)
Jul 12 18:27:17 new-yoda systemd-udevd[1494]: Using default interface
naming scheme 'v247'.
Jul 12 18:27:17 new-yoda systemd-udevd[1494]: ethtool: autonegotiation
is unset or enabled, the speed and duplex are not writable.
Jul 12 18:27:17 new-yoda kernel: [ 8560.449674] asix 1-1:1.0
enxd8eb97bf5ad0: renamed from eth0
Jul 12 18:27:17 new-yoda NetworkManager[448]: <info> [1657668437.1103]
device (eth0): interface index 5 renamed iface from 'eth0' to
'enxd8eb97bf5ad0'
Jul 12 18:27:17 new-yoda systemd-udevd[1494]: ethtool: autonegotiation
is unset or enabled, the speed and duplex are not writable.
Jul 12 18:27:19 new-yoda ModemManager[489]: <info> [base-manager]
couldn't check support for device
'/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1': not supported by any
plugin
Looks like kernel finds usb NIC again and tries to do something? Since
dhclient is not aware, it does not know how to handle. I get this from
dhclient for the *next* DHCPDISCOVER/REQUEST
Jul 12 19:45:04 new-yoda dhclient[550]: DHCPREQUEST for 192.168.1.124
on enxd8eb97bf5ad0 to 192.168.1.254 port 67
Jul 12 19:45:04 new-yoda dhclient[550]: send_packet: Network is
unreachable
Jul 12 19:45:04 new-yoda dhclient[550]: send_packet: please consult
README file regarding broadcast address.
Hope you can find something useful. For now, I simply edited
avahi-daemon.conf and denied this interface as one not to be
observed/managed. That fixed the part of the problem. Other issue is
reported in one of my followup.
Regards
Ramesh
