ISC DHCP 4.3.1
Problem description: using DHCPv6 on SLC5 at CERN requires some tweaking of the network configuration files, due to a RedHat bug (https://bugzilla.redhat.com/show_bug.cgi?id=591630, https://bugzilla.redhat.com/show_bug.cgi?id=634857) and the way devices are authorized to connect to the network at CERN (i.e. by MAC address identification).
This page is obsolete and may no longer be relevant with the latest version of SLC6.
Add these lines to /etc/network/interfaces
iface eth0 inet6 static address 2001:1458:E008:0001::2 netmask 64 gateway 2001:1458:E008:0001::1 pre-up modprobe ipv6
Add these lines to /etc/sysconfig/network-scripts/ifcfg-eth0
Add these lines to /etc/sysconfig/network
WARNING: SLC5 images have the ipv6 module disabled. Please edit the file /etc/modprobe.conf and remove the lines which disable ipv6 (#alias ipv6 off, #options ipv6 disable=1); then reboot.