Michael Takeuchi

1. MikroTik-1

/interface bridge
add name=lo
add name=network
/routing bgp instance
set default as=100 router-id=1.1.1.1
/ip address
add address=1.1.1.1 interface=lo
add address=12.12.12.1/30 interface=ether1
add address=10.10.10.10 interface=network
/ip route
add distance=1 dst-address=2.2.2.2/32 gateway=12.12.12.2
/routing bgp network
add network=10.10.10.10/32
/routing bgp peer
add name=peer1 remote-address=2.2.2.2 remote-as=100 update-source=lo
/system identity
set name=R1

2. MikroTik-2

/interface bridge
add name=lo
add name=network
/routing bgp instance
set default as=100 router-id=2.2.2.2
/ip address
add address=12.12.12.2/30 interface=ether1
add address=2.2.2.2 interface=lo
add address=20.20.20.20 interface=network
/ip route
add distance=1 dst-address=1.1.1.1/32 gateway=12.12.12.1
/routing bgp network
add network=20.20.20.20/32
/routing bgp peer
add name=peer1 remote-address=1.1.1.1 remote-as=100 update-source=loopback
/system identity
set name=R2