DATA LINK PORT Support: All Name of the data link port used for this circuit. Not supported on DA circuits. DATA LINK SDU SIZE Support: All Maximum size, in octets, of a Data Link SDU for this circuit. This includes the Network layer header, but excludes the Data Link layer header. The value of this status is the lesser of the value of the characteristic manual data link sdu size and any limit imposed by the Data Link layer. LAN L1 ID Support: L1,L2 LAN ID allocated by the LAN level 1 designated router. This attribute is supported only if the circuit's characteristic type is csma-cd. LAN L2 ID Support: L2 LAN ID allocated by the LAN level 2 designated router. This attribute is supported only if the circuit's characteristic type is CSMA-CD. L1 DESIGNATED ROUTER Support: L1,L2 ID of the DECnet-Plus level 1 designated router on this circuit. This attribute is supported only if the circuit's characteristic type is CSMA-CD. If this node does not participate in the router election process, the value returned is 00-00-00-00-00-00. L2 DESIGNATED ROUTER Support: L2 ID of the DECnet-Plus level 2 designated router on this circuit. This attribute is supported only if the circuit's characteristic type is CSMA-CD. If this node does not participate in the router election process, the value returned is 00-00-00-00-00-00. PHASEIV DESIGNATED ROUTER Support: L1,L2 ID of the Phase IV designated router on this circuit. This attribute is supported only if the circuit's characteristic type is CSMA-CD. If this node does not participate in the router election process, the value returned is 00-00-00-00-00-00. POINT-TO-POINT ID Support: L1,L2 ID allocated to the circuit during its initialization. This attribute is supported only if the circuit's characteristic type is HDLC, DDCMP, or X25 static. STATE State of the routing circuit entity. OFF - The circuit is disabled. ON - The circuit is enabled.