Upgrading from hardy to lucid activates ipv6

[caroeber]

I have up recently upgraded from:
# lsb_release -rd
Description: Ubuntu 8.04.3 LTS
Release: 8.04
To:
# lsb_release -rd
Description: Ubuntu 10.04 LTS
Release: 10.04

And had turned off IPv6 with the following:
ifconfig ethX del addr/prefixlen
echo 'blacklist ipv6' | sudo tee -a '/etc/modprobe.d/blacklist.local' >/dev/null
sudo sed -i -e 's/alias net-pf-10 ipv6/#&\nalias net-pf-10 off/' /etc/modprobe.d/aliases

After the upgrade the system is showing that there is an IPv6 address assigned.

This is remove with ifconfig ethX del addr/prefixlen but:
There is no /etc/modprobe.d/aliases or /etc/modprobe.d/blacklist.local
There is no documentation inregards to IPv6 at https://help.ubuntu.com/10.04/serverguide/C/tcpip.html

This is not a protocol that needs to be running on the system.
This should never have been reactivated by the upgrade.

[Book 'em Dano (heymrdjd)]

A lot of things have changed since Hardy. I'm not familiar with Ubuntu server editions, but I believe I can provide an answer to your quandary. You could add a boot option that would disable IPv6, edit /etc/default/grub by adding ipv6.disable=1 to the GRUB_CMDLINE_LINUX_DEFAULT line, then execute update-grub. Or, I'm not sure if network-manager is running on your server, but if it is then you could edit the eth0 connection and under the IPv6 Settings tab, choose Ignore in the Method field to obtain that address.

[shankao (shankao)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage . I have classified this bug as a bug in update-manager.

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://help.ubuntu.com/community/ReportingBugs.