[Bug 770324] Re: DNS resolvers are not requested/learned from DHCPv6

[Launchpad Bug Tracker]

This bug was fixed in the package isc-dhcp - 4.1.1-P1-17ubuntu3

---------------
isc-dhcp (4.1.1-P1-17ubuntu3) oneiric; urgency=low

  * Add DHCPv6 client configuration to dhclient.conf (LP: #770324)
 -- Stephane Graber <stgraber at ubuntu.com>   Mon, 20 Jun 2011 09:41:26 -0400

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

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https://bugs.launchpad.net/bugs/770324

Title:
  DNS resolvers are not requested/learned from DHCPv6

Status in “isc-dhcp” package in Ubuntu:
  Fix Released

Bug description:
  Binary package hint: network-manager

  When attempting to connect to a DHCPv6-using network (after having set
  the IPv6 mode in the connection profile to "automatic"), DHCPv6 is
  successfully used to acquire and configure an IPv6 address, however at
  no point does the Ubuntu host request DNS servers from DHCPv6. This
  means that only IPv4 DHCPv4-provided name servers are being added, or
  if there's no IPv4 on the network, *no* name servers are being
  configured - the network connection is for all practical purposes
  unusable.

  I reproduced this easily using the Ubuntu 11.04 Beta 2 64-bit desktop
  live-CD. I'll be attaching a PCAP dump containing the network traffic
  from when the network connection was established. You can see clearly
  that the ICMPv6 Router Advertisement (frame 16) has both the M and O
  flags set, but the DHCPv6 queries (frames 23 and 27) do not request
  neither DNS recursive name servers nor the domain search list.
  Essentially it behaves as if the O flag was unset. I'll also be
  attaching the content logged to /var/log/syslog during the network
  connection attempt.

  Curiously enough, Fedora 14 (also using NetworkManager) has no
  problems connecting to the exact same network and discovering the DNS
  server using DHCPv6. I'll also attach a PCAP file containing the
  DHCPv6 traffic from that connection attempt, and it's clear that the
  DNS information is requested and received, and also shows up in
  /etc/resolv.conf in the end.

  Tore

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