[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

[Chris J Arges]

Hello Scott, or anyone else affected,

Accepted isc-dhcp into trusty-proposed. The package will build now and
be available at https://launchpad.net/ubuntu/+source/isc-
dhcp/4.2.4-7ubuntu12.8 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: isc-dhcp (Ubuntu Trusty)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

** Changed in: isc-dhcp (Ubuntu Precise)
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1633479

Title:
  dhclient does not wait for ipv6 dad (duplicate address detection)

Status in isc-dhcp package in Ubuntu:
  Fix Released
Status in isc-dhcp source package in Precise:
  Fix Committed
Status in isc-dhcp source package in Trusty:
  Fix Committed
Status in isc-dhcp source package in Xenial:
  Fix Committed
Status in isc-dhcp source package in Yakkety:
  In Progress

Bug description:
  dhclient -6 does not wait for an interface go through duplicate address detection.
  As a result the following will almost always fail:

   $ dev=eth0
   $ ip link set down dev $dev
   $ dhclient -6 -1 -v eth0
   Internet Systems Consortium DHCP Client 4.3.3
   Copyright 2004-2015 Internet Systems Consortium.
   All rights reserved.
   For info, please visit https://www.isc.org/software/dhcp/

   Can't bind to dhcp address: Cannot assign requested address
   Please make sure there is no other dhcp server
   running and that there's no entry for dhcp or
   bootp in /etc/inetd.conf.   Also make sure you
   are not running HP JetAdmin software, which
   includes a bootp server.

   If you think you have received this message due to a bug rather
   than a configuration issue please read the section on submitting
   bugs on either our web page at www.isc.org or in the README file
   before submitting a bug.  These pages explain the proper
   process and the information we find helpful for debugging..
   $ echo $?
   1

  Related bugs:
   * bug 1447715: dhclient -6: Can't bind to dhcp address: Cannot assign requested address
   * bug 1633562: 'dhclient -6 -S' does not bring interface up 

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: isc-dhcp-client 4.3.3-5ubuntu15
  ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
  Uname: Linux 4.8.0-22-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.3-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Oct 14 09:18:52 2016
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-07-23 (449 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
  SourcePackage: isc-dhcp
  UpgradeStatus: No upgrade log present (probably fresh install)

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