This problem seems to be caused by a duplicate address, when another host is trying to use the same address as the NTP server. I am using ntp version 4.2.8p9, with two local patches applied.
In /var/log/ntp.log, the following three errors are repeated many times: bind(20) AF_INET6 fe80::250:56ff:fe84:8834%11#123 flags 0x1 failed: Cannot assign requested address unable to create socket on br1 (100384) for fe80::250:56ff:fe84:8834%11#123 failed to init interface for address fe80::250:56ff:fe84:8834%11 In /var/log/dmesg, there are a few of these: IPv6: br1: IPv6 duplicate address fe80::250:56ff:fe84:8834 detected! and a lot of these: br1: received packet on tap2 with own address as source address -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/569919 Title: ntpd constantly complains about being unable to create socket To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ntp/+bug/569919/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
