Virtualisation Xen Important: Never configure your network card as bridge. You may broadcast a virtual MAC address on the network, causing the emergency shutdown of your network port and the suspension of your server. Configure only NAT or routed mode! Failover IP Xen Change the file xend-config.sxp for the usage of the “route” scripts of Xen (network-script network-route) (vif-script vif-route) add to the script echo 'echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp' >> /etc/xen/scripts/network-route in the XEN configuration of the VM: vif = [ 'ip=my_ip_failover' ] netmask = "255.255.255.0" gateway = "ADDR_IP_MACHINE_HOST" in the configuration of the VM auto eth0 iface eth0 inet static address my_ip_failover netmask 255.255.255.255 post-up /sbin/ip route add ADDR_IP_MACHINE_HOST/32 dev eth0 post-up /sbin/ip route add default via ADDR_IP_MACHINE_HOST