*** This bug is a duplicate of bug 1447715 ***
https://bugs.launchpad.net/bugs/1447715
This was fixed via update to isc-dhcp in bug 1633479. Please see that
bug for the specific isc-dhcp version number needed to fix the bug.
** This bug has been marked a duplicate of bug 1447715
dhclient -6: Can't bind to dhcp address: Cannot assign requested address
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https://bugs.launchpad.net/bugs/1543352
Title:
inet6 dhcp doesn't wait for link-local address to leave tentative -
dhclient fails to bind
Status in ifupdown package in Ubuntu:
Triaged
Bug description:
=
Description: Ubuntu Xenial Xerus (development branch)
Release: 16.04
ifupdown:
Installed: 0.8.10ubuntu1
Candidate: 0.8.10ubuntu1
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With an /etc/network/interfaces file containing:
auto eno16780032
iface eno16780032 inet dhcp
iface eno16780032 inet6 dhcp
On boot, ifup starts 'dhclient -6' before the link local address has
completed Duplicate Address Discovery (the address is marked
'tentative'). In turn, dhclient reports 'Can't bind to dhcp address:
Cannot assign requested address', and fails almost immediately.
It would seem that either wait-for-ll6.sh should wait for the link
local address to come up AND stop being tentative, or the dhcp method
for inet6 should call settle-dad.sh after wait-for-ll6?
This is partly a race condition, so on slower devices the dad may
complete by the time dhclient has got started, however I can regularly
reproduce this on a virtual machine.
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