** Changed in: cloud-init (Ubuntu)
   Importance: Undecided => High

** Changed in: cloud-init (Ubuntu)
       Status: New => Confirmed

** Description changed:

  https://bugs.launchpad.net/ubuntu/+source/klibc/+bug/1621507 talks of
  how ipv6 netboot with iscsi root disk doesn't work, blocking ipv6-only
  After I hand-walked busybox through getting an IPv6 address, everything
  worked just fine until cloud-init couldn't fetch the instance data,
  because it insisted on bringing up the interface in IPv4, and there is
  no IPv4 DHCP on that vlan.
  Please work with initramfs and friends on getting ipv6 netboot to
  actually configure the interface.  This may be as simple as teaching it
  about "inet6 dhcp" interfaces, and bolting the pieces together.  Note
  that "use radvd" is not really an option for our use case.
+ Related bugs:
+  * bug 1621507: initramfs-tools configure_networking() fails to dhcp ipv6 

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  network not configured when ipv6 netbooted into cloud-init

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