Adding on to my previous comment, I had tried a fresh Debian jessie
install with v3.16 of the Linux kernel. DHCPv6 works just fine until I
switch to the one in the jessie-backports repo, which currently is 4.6.
So somewhere between 3.16 and one of the 4.x kernels a regression was
introduced.
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I did a quick capture with Wireshark (this time using Hyper-V on Windows
10) and indeed the VM sends out a solicit, but I don't see any evidence
of it reaching the router (nothing in the logs). DHCP Guard is switched
off but I think that would affect a DHCP server, not a client. Plain
SLAAC with
apport information
** Attachment added: "CRDA.txt"
https://bugs.launchpad.net/bugs/1624722/+attachment/4742792/+files/CRDA.txt
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https://bugs.launchpad.net/bugs/1624722
apport information
** Tags added: apport-collected
** Description changed:
When using Ubuntu (in this case the live 16.04.1 LTS ISO) as a
Generation 2 (Gen1 untested) Hyper-V VM, an IPv6 address can't be gotten
through DHCPv6. dhclient continues to send out solicitations but they
never
apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1624722/+attachment/4742797/+files/ProcModules.txt
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apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1624722/+attachment/4742793/+files/CurrentDmesg.txt
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apport information
** Attachment added: "PulseList.txt"
https://bugs.launchpad.net/bugs/1624722/+attachment/4742798/+files/PulseList.txt
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apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1624722/+attachment/4742800/+files/WifiSyslog.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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apport information
** Attachment added: "JournalErrors.txt"
https://bugs.launchpad.net/bugs/1624722/+attachment/4742794/+files/JournalErrors.txt
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apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1624722/+attachment/4742796/+files/ProcInterrupts.txt
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1624722/+attachment/4742799/+files/UdevDb.txt
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apport information
** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/1624722/+attachment/4742795/+files/ProcCpuinfo.txt
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Public bug reported:
When using Ubuntu (in this case the live 16.04.1 LTS ISO) as a
Generation 2 (Gen1 untested) Hyper-V VM, an IPv6 address can't be gotten
through DHCPv6. dhclient continues to send out solicitations but they
never result in a response. I've looked on the router end (running
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