Public bug reported:
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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.
** Affects: ifupdown (Ubuntu)
Importance: Undecided
Status: New
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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
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