Routing Type (3 bits) (Token-Ring)

Protocol: Token-Ring RIF / Source Routing RIF PCI (0-30 bytes) (Token-Ring)

Field: RIF / routing type

Length: 3 bits

Contents: indicates the kind of broadcast (if any).

BBB = 0?? = non-broadcast

Indicates that the route designators are already given (source station prescribes the frame's path).

BBB = 10? = all-routes broadcast

This broadcast frame has to be transmitted by all token-ring bridges. This will cause that there will arrive multiple copies of the frame at the destination station.

BBB = 11? = single-route broadcast

This broadcast frame has to be transmitted only be the first bridge of each ring in source-to-destination direction; it will be sent back (destination-to-source direction) via all routes (similar to all-routes broadcast).