Specifies whether, when bridging Netbios packets which are source-routing explorer frames, the routing information is to be stripped or propagated. If pass- Rif(1), the frame is bridged as is, with route- discovery proceeding as expected. If stripRif(2), then the routing information field is stripped before being propagated. This option allows non-source-routing (e.g., Ethernet) Netbios hosts to communicate tran- sparently. If passBoth(3), then both the original source-routed frame and the transparent equivalent are propagated. This choice provides maximum connectivity at some expense in network traffic. None(4) is identical to passRif. This option applies only to token ring ports.