root@ale:~# ifdown eth0; ifup eth0
ifdown: interface eth0 not configured
net.ipv6.conf.eth0.accept_ra = 1
net.ipv6.conf.eth0.autoconf = 1
root@ale:~# grep nameserver /etc/resolv.conf
nameserver 172.16.xxx.xxx
root@ale:~# apt-get install isc-dhcp-client=4.1.ESV-R4-0ubuntu5.9 isc-dhcp-common=4.1.ESV-R4-0ubuntu5.9
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
resolvconf avahi-autoipd
The following packages will be upgraded:
isc-dhcp-client isc-dhcp-common
2 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
Need to get 0 B/637 kB of archives.
After this operation, 0 B of additional disk space will be used.
(Reading database ... 225378 files and directories currently installed.)
Preparing to replace isc-dhcp-client 4.1.ESV-R4-0ubuntu5.8 (using .../isc-dhcp-client_4.1.ESV-R4-0ubuntu5.9_amd64.deb) ...
Unpacking replacement isc-dhcp-client ...
Preparing to replace isc-dhcp-common 4.1.ESV-R4-0ubuntu5.8 (using .../isc-dhcp-common_4.1.ESV-R4-0ubuntu5.9_amd64.deb) ...
Unpacking replacement isc-dhcp-common ...
Processing triggers for man-db ...
Setting up isc-dhcp-common (4.1.ESV-R4-0ubuntu5.9) ...
Setting up isc-dhcp-client (4.1.ESV-R4-0ubuntu5.9) ...
root@ale:~# ifdown eth0; ifup eth0
Sleeping for 338 seconds ...
net.ipv6.conf.eth0.accept_ra = 1
net.ipv6.conf.eth0.autoconf = 1
root@ale:~# grep nameserver /etc/resolv.conf
nameserver 2401:xxxx:xxxx::53
root@ale:~# apt-cache policy isc-dhcp-client R4-0ubuntu5. 8 R4-0ubuntu5. 8 1.ESV-R4- 0ubuntu5. 9 0 ubuntu- precise. mirror. corp.google. com/ubuntu/ precise- proposed/ main amd64 Packages R4-0ubuntu5. 8 0 /rapture- prod.corp. google. com/ ubuntu- precise- base/main amd64 Packages dpkg/status interfaces
isc-dhcp-client:
Installed: 4.1.ESV-
Candidate: 4.1.ESV-
Version table:
4.
400 http://
*** 4.1.ESV-
600 https:/
100 /var/lib/
root@ale:~# tail -n 5 /etc/network/
auto eth0
iface eth0 inet manual
iface eth0 inet6 auto
dhcp 1
root@ale:~# ifdown eth0; ifup eth0 conf.eth0. accept_ ra = 1 conf.eth0. autoconf = 1 client= 4.1.ESV- R4-0ubuntu5. 9 isc-dhcp- common= 4.1.ESV- R4-0ubuntu5. 9 R4-0ubuntu5. 8 (using .../isc- dhcp-client_ 4.1.ESV- R4-0ubuntu5. 9_amd64. deb) ... R4-0ubuntu5. 8 (using .../isc- dhcp-common_ 4.1.ESV- R4-0ubuntu5. 9_amd64. deb) ... R4-0ubuntu5. 9) ... R4-0ubuntu5. 9) ... conf.eth0. accept_ ra = 1 conf.eth0. autoconf = 1
ifdown: interface eth0 not configured
net.ipv6.
net.ipv6.
root@ale:~# grep nameserver /etc/resolv.conf
nameserver 172.16.xxx.xxx
root@ale:~# apt-get install isc-dhcp-
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
resolvconf avahi-autoipd
The following packages will be upgraded:
isc-dhcp-client isc-dhcp-common
2 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
Need to get 0 B/637 kB of archives.
After this operation, 0 B of additional disk space will be used.
(Reading database ... 225378 files and directories currently installed.)
Preparing to replace isc-dhcp-client 4.1.ESV-
Unpacking replacement isc-dhcp-client ...
Preparing to replace isc-dhcp-common 4.1.ESV-
Unpacking replacement isc-dhcp-common ...
Processing triggers for man-db ...
Setting up isc-dhcp-common (4.1.ESV-
Setting up isc-dhcp-client (4.1.ESV-
root@ale:~# ifdown eth0; ifup eth0
Sleeping for 338 seconds ...
net.ipv6.
net.ipv6.
root@ale:~# grep nameserver /etc/resolv.conf
nameserver 2401:xxxx:xxxx::53
(IP addresses edited out.) Works for me.