[ Node A ] [ Node B ] [ Node C ]
[Lo0:1.1.1.1] [et0] <- Eth -> [et0] lo0:1.1.1.2 [et1] <- Eth -> [et1] [lo0:1.1.1.3]
Note: EtX interface IP addresses are not advertised; packets must be sourced from a loopback interface to make a successful round trip.