FDDI Management
The supported version range is identified with the ietf-fddi MIB by two smtTable attributes: fddimibSMTLoVersionId and fddimibSMTHiVersionId. If a received frame is not within the supported version range, the frame is discarded.
MAC Cts
Displays the number of Media Access Control (MAC) entities assigned to each SMT entity.
Optical Bypass Switch
Indicates whether an Optical Bypass Switch is attached to the module’s A and B ports. An Optical Bypass Switch can prevent a faulty node from causing a wrap condition or bringing down the ring by bypassing the faulty station and allowing the signal to continue to the next station in the ring.
CF State
The CF (Configuration Management) State displays a value that represents the paths — or ring segments — in which the A and B ports are currently inserted; possible values are:
•Isolated ––the node is isolated from all available rings.
•Local-A––the A port is inserted into a local path; the B port is not inserted into a local path.
•Local-B––The B port is inserted into a local path; the A port is not inserted into a local path.
•Local-AB––both the A and B ports are inserted into a local path.
•Wrap-A––the secondary path is wrapped to the A port.
•Wrap-B––the secondary path is wrapped to the B port.
•Wrap-AB––the primary path is wrapped to the B port, and the secondary path is wrapped to the A port.
•C-Wrap-A––the primary and secondary paths are joined internal to the node, and wrapped to the A port.
•C-Wrap-B––the primary and secondary paths are joined internal to the node, and wrapped to the B port.
•C-Wrap-AB— The primary path is wrapped to the B port and the secondary path is wrapped to the A port.
•Thru ––the primary path enters the A port, and exits from the B port; the secondary path enters the B port, and exits from the A port.
•? ––SPMA cannot determine the current CF State.
