[pkg-dhcp-devel] Bug#783387: isc-dhcp-client: dhclient -6 -P does not wait link local address to be ready

[Landry MINOZA]

Package: isc-dhcp-client
Version: 4.3.1-6
Severity: normal

Dear Maintainer,

This configuration used to work on wheezy:
iface eth0 inet6 static
    address 2001:0bc8:32b1::1
    netmask 64
    pre-up dhclient -cf /etc/dhcp/dhclient6.conf -pf /run/dhclient6.eth0.pid -6 -P eth0
    pre-down dhclient -x -pf /run/dhclient6.eth0.pid

with /etc/dhcp/dhclient6.conf containing:
interface "eth0" {
        send dhcp6.client-id ##REDACTED##;
	supersede dhcp6.name-servers ::1;
	supersede dhcp6.domain-searchi "mydomain.example.com.";
}

Since upgraded to jessie, I had to add "pre-up sleep 10" before dhclient
line. If not, dhclient give up with the following error and does not allow
static IPv6 to be configured:

dhclient: no link-local IPv6 address for eth0

I also tried to add "-w" option to dhclient line without effect.

Dhclient should wait link-local address to be ready and not give up
immediately (especialy with "-w" option).
I've found similar bug on Red-Hat bugzilla:
https://bugzilla.redhat.com/show_bug.cgi?id=1130803
They don't seams to have issue an upstream bug.


-- System Information:
Debian Release: 8.0
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages isc-dhcp-client depends on:
ii  debianutils       4.4+b1
ii  iproute2          3.16.0-2
ii  isc-dhcp-common   4.3.1-6
ii  libc6             2.19-18
ii  libdns-export100  1:9.9.5.dfsg-9
ii  libirs-export91   1:9.9.5.dfsg-9
ii  libisc-export95   1:9.9.5.dfsg-9

isc-dhcp-client recommends no packages.

Versions of packages isc-dhcp-client suggests:
pn  avahi-autoipd  <none>
pn  resolvconf     <none>

-- no debconf information