> [0.004078] [msg_test/INFO] Node types in the trace:
> [0.004078] [msg_test/INFO] HOST
> [0.004078] [msg_test/INFO] LINK
> [0.004078] [msg_test/INFO] Node types in the trace:
> [0.004078] [msg_test/INFO] HOST
> [0.004078] [msg_test/INFO] LINK
> [0.004078] [msg_test/INFO] 0-HOST1-LINK3
> [0.004078] [msg_test/INFO] 0-LINK3-HOST1
> [0.004078] [msg_test/INFO] 0-LINK3-LINK3
> [0.004078] [msg_test/INFO] 0-HOST1-LINK3
> [0.004078] [msg_test/INFO] 0-LINK3-HOST1
> [0.004078] [msg_test/INFO] 0-LINK3-LINK3