auto lo
iface lo inet loopback

# Configure bond0 interface with static IP
auto bond0
iface bond0 inet static
    address {ip_address}
    netmask 255.255.255.0
    gateway {gateway}
    bond-slaves {interface1} {interface2} 
    bond-mode active-backup
    bond-miimon 100

# Ensure that slave interfaces do not get IP addresses
allow-hotplug {interface1}
iface {interface1} inet manual
    bond-master bond0

allow-hotplug {interface2}
iface {interface2} inet manual
    bond-master bond0