IP fault tolerance on Debian Squeeze couldn't be easier than with UCARP!: Install UCARP on all nodes: apt-get install ucarp Edit /etc/network/interfaces on all nodes, replacing <CLUSTER IP> and <PASSWORD> as appropriate: iface eth0 inet static ... ucarp-vid 3 ucarp-vip <CLUSTER IP> ucarp-password <PASSWORD> ucarp-xparam -n iface eth0:ucarp inet static address <CLUSTER IP> netmask 255.255.255.255 … Continue reading UCARP and Squeeze