** Description changed: initramfs' configure_networking function uses ipconfig to configure the network. ipconfig does not support dhcpv6. See: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=627164 Related bugs: * bug 1229458: grub2 needed changes * bug 1621615: network not configured when ipv6 netbooted into cloud-init - * bug 1635716: Can't bring up a machine on a dual network (ipv4 and ipv6) - + * bug 1635716: Can't bring up a machine on a dual network (ipv4 and ipv6) [Impact] It is not possible to netboot Ubuntu with a network-based root filesystem in an ipv6-only environment. Anyone wanting to netboot in an ipv6-only environment is affected. - These uploads address this by replacing the one-off klibc dhcp client - (IPv4-only) with the defacto standard isc-dhcp-client, and thereby - provide both ipv6 and ipv4 DHCP configuration. + These uploads add "ip6=" to the command line syntax to configure ipv6 + using the defacto isc-dhcp-client. IPv4 configuration (and "ip=" + syntax) remain unchanged. + + Valid format for the ip6= command line option is: + ip6=none (or ip6=off or ip6=) -- do not configure ipv6 + ip6=DEVICE -- run IPv6 dhclient on device DEVICE. [Test Case] See Bug 1229458. Configure radvd, dhcpd, and tftpd for your ipv6-only netbooting world. Pass the boot process an ipv6 address to talk to, and see it fail to configure the network. [Regression Potential] 1) This increases the uncompressed initramfs size by approximately 500KB, since isc-dhcp-client is added, but klibc is still needed for some other things, and is therefore present. On systems with a very small /boot partition, this could result in failure to upgrade the initramfs. 2) In at least some cases, DHCP network configuration shifts from klibc's ipconfig to isc-dhcp-client's dhclient. This should be of minimal risk, as isc-dhcp-client is in very very widespread use. In the event of a regression, network boot would fail, but the prior kernel should still be bootable.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1621507 Title: initramfs-tools configure_networking() fails to dhcp ipv6 addresses To manage notifications about this bug go to: https://bugs.launchpad.net/maas/+bug/1621507/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
