[Bug 1533631] Re: Failed to renew DHCPv6 lease after suspend

[TJ]

Attaching a Network Manager TRACE log_level from syslog generated using:

/etc/NetworkManager/conf.d/logging.conf:
---
[logging]
level=TRACE
---

I've removed any extraneous messages from processes other than NM and
dhclient. I've also removed IPv4 related messages to make it easier to
follow.

** Attachment added: "Network Manager TRACE debug log"
   https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1533631/+attachment/4617754/+files/nm-debug.log

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to isc-dhcp in Ubuntu.
https://bugs.launchpad.net/bugs/1533631

Title:
  Failed to renew DHCPv6 lease after suspend

Status in isc-dhcp package in Ubuntu:
  Triaged
Status in network-manager package in Ubuntu:
  Triaged

Bug description:
  After fixing IPv6 address assignment (#1469346), IPv6 works fine until
  sleep. On wake up ubuntu fails to renew its IPv6 lease:

  Jan 13 10:47:47 ubuntu dhclient: PRC: Renewing lease on wlp3s0.
  Jan 13 10:47:47 ubuntu dhclient: PRC: Rebinding lease on wlp3s0.
  Jan 13 10:47:47 ubuntu dhclient: XMT: Rebind on wlp3s0, interval 9890ms.
  Jan 13 10:47:47 ubuntu NetworkManager[796]: <info>  (wlp3s0): DHCPv6 state changed bound -> unknown
  Jan 13 10:47:47 ubuntu dhclient: PRC: Address 2a02:xxxx:xxxx:xxxx::b44 depreferred.
  Jan 13 10:47:47 ubuntu NetworkManager[796]: <info>  (wlp3s0): DHCPv6 state changed unknown -> expire
  Jan 13 10:47:47 ubuntu NetworkManager[796]: <info>  (wlp3s0): canceled DHCP transaction, DHCP client pid 1170
  Jan 13 10:47:47 ubuntu NetworkManager[796]: <info>  (wlp3s0): DHCPv6 state changed expire -> done

  I'm not sure that it's solely NetworkManager issue (dhclient could
  also be affected).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1533631/+subscriptions