Now it's working. But I don't know how to enable ifenslave at boot? # ifenslave bond0 eth0 eth1 Can I put that in /etc/network/interfaces? My howto: (Is it correct?) # apt-get install ifenslave In /etc/modules i put "bonding". In /etc/network/interfaces I put this: auto bond0 iface bond0 inet static address 1.2.3.4 netmask 1.2.3.4 gateway 1.2.3.4 -- Jacob http://webcom.dk/