[Bug 1551351] Re: dhclient does not renew leases

[Petr Suchý]

Some details:
===
dpkg --list|grep -u dhc
ii  isc-dhcp-client                               4.3.3-5ubuntu12.7                                        amd64        DHCP client for automatically obtaining an IP address
ii  isc-dhcp-common                               4.3.3-5ubuntu12.7                                        amd64        common files used by all of the isc-dhcp packages
===
dpkg --list|grep -i bind9
ii  bind9-host                                    1:9.10.3.dfsg.P4-8ubuntu1.10                             amd64        Version of 'host' bundled with BIND 9.X
ii  libbind9-140:amd64                            1:9.10.3.dfsg.P4-8ubuntu1.10                             amd64        BIND9 Shared Library used by BIND
rc  libbind9-90                                   1:9.9.5.dfsg-3ubuntu0.8                                  amd64        BIND9 Shared Library used by BIND

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https://bugs.launchpad.net/bugs/1551351

Title:
  dhclient does not renew leases

Status in bind9 package in Ubuntu:
  Fix Released
Status in isc-dhcp package in Ubuntu:
  Fix Released
Status in bind9 source package in Xenial:
  Fix Released
Status in isc-dhcp source package in Xenial:
  Fix Released

Bug description:
  Release: Xenial

  I think this only recently started after some bind9 updates triggered a rebuild. When booting dhclient gets started and acquires an IP address, but it does seem to lock up somewhere as it does not renew the lease.
  In my environment I set the lease time to 5 minutes, so I notice such things rather soon. I looked on the dhcp server side but saw any further dhcp messages come in from the client side.

  Related bugs:
   * bug 1551415:  systemctl stop networking hang / timeout 

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: isc-dhcp-client 4.3.3-5ubuntu8
  ProcVersionSignature: Ubuntu 4.4.0-9.24-generic 4.4.3
  Uname: Linux 4.4.0-9-generic x86_64
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  Date: Mon Feb 29 12:32:52 2016
  DhclientLeases:

  SourcePackage: isc-dhcp
  UpgradeStatus: No upgrade log present (probably fresh install)

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