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

[TJ]

** Changed in: network-manager (Ubuntu)
   Importance: Undecided => High

** Also affects: isc-dhcp (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: isc-dhcp (Ubuntu)
   Importance: Undecided => High

** Changed in: isc-dhcp (Ubuntu)
       Status: New => Triaged

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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:
  Confirmed

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).

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