create memif socket id {sid1} filename {socket1}
create interface memif id {mid1} socket-id {sid1} hw-addr {mac1} master
set interface ip address memif{sid1}/{mid1} 1.1.{sid1}.1/24
set interface state memif{sid1}/{mid1} up

create memif socket id {sid2} filename {socket2}
create interface memif id {mid2} socket-id {sid2} hw-addr {mac2} master
set interface ip address memif{sid2}/{mid2} 1.1.{sid2}.1/24
set interface state memif{sid2}/{mid2} up

set ip arp static memif{sid1}/{mid1} 1.1.{sid1}.2 {vif1_mac}
set ip arp static memif{sid2}/{mid2} 1.1.{sid2}.2 {vif2_mac}

ip route add 10.0.0.0/8 via 1.1.{sid1}.2
ip route add 20.0.0.0/8 via 1.1.{sid2}.2