ip route add tunnel_network_1 dev eth0 src tunnel_address_1 table 1
ip route add default via tunnel_nexthop_1 table 1
ip route add tunnel_network_2 dev eth1 src tunnel_address_2 table 2
ip route add default via tunnel_nexthop_2 table 2
ip route add tunnel_network_1 dev eth0 src tunnel_address_1
ip route add tunnel_network_2 dev eth1 src tunnel_address_2
ip route add default scope global nexthop via tunnel_nexthop_1 dev eth0 weight 1 nexthop via tunnel_nexthop_2 dev eth1 weight 1
ip rule add from tunnel_address_1 table 1
ip rule add from tunnel_address_2 table 2