auto fabric
iface fabric inet static
    address 10.6.1.1
    network 10.6.1.0
    netmask 255.255.255.0
    broadcast 10.6.1.255
    gateway 10.6.1.1
    bridge_ports eth3

auto fabric:0
iface fabric:0 inet static
    address 10.6.1.129
    netmask 255.255.255.0

auto fabric:1
iface fabric:1 inet static
    address 10.6.1.193
    netmask 255.255.255.0