auto lo
iface lo inet loopback
auto eth0
iface eth0 inet manual
bond-master bond0
bond-primary eth0
auto eth1
iface eth1 inet manual
bond-master bond0
auto bond0
iface bond0 inet static
address 192.168.20.50
gateway 192.168.20.1
netmask 255.255.255.0
bond-mode balance-rr
bond-miimon 100
bond-slaves none