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

[Scott Moser]

** Description changed:

  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
+  $ 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 
  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)

** Description changed:

  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
  
- Related bugs:
-  * bug 1447715: dhclient -6: Can't bind to dhcp address: Cannot assign requested address 
  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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https://bugs.launchpad.net/bugs/1633479

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

Status in isc-dhcp package in Ubuntu:
  Confirmed

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

  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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