FDDI Applications

Concentrator Non-M Ports

This Þeld display the number of non-Master ports (A, B, or S ports) on the modular FDDI BRIM concentrator.

Number of MACs

The number of Media Access Control entities present in the FDDI BRIM, indicating the number of ring port pairs. For the FDDI BRIM, this number will be 1.

MAC Path

This Þeld displays the conÞguration of the MAC with respect to the logical ring, as determined by the Connection Management (CMT) portion of SMT. CMT controls the establishment of a media attachment to the FDDI network, the connections with other nodes in the ring, and the internal conÞguration of the various entities within a node. CMT provides the link conÞdence test and speciÞes a Link Error Monitor (LEM) which monitors active links on a per-link basis to ensure that failing links are detected and, if required, removed from the network. Possible values are:

¥Primary 1Ñthe Primary 1 FDDI ring is being used.

¥Secondary 1Ñthe Secondary 1 FDDI ring is being used.

¥Primary 2Ñthe Primary 2 FDDI ring is being used.

¥Secondary 2Ñthe Secondary 2 FDDI ring is being used.

¥LocalÑthe MAC is not inserted into a primary or secondary path of a dual ring, but may be connected to one or more other nodes.

¥IsolatedÑthe MAC has no connection to the ring or other concentrator ports.

¥Unknown or SPECTRUM Element Manager cannot determine the MAC path for the FDDI BRIM.

Ring Configuration

The current conÞguration of the MAC and physical layers of the A and B ports.

Connection Policy Window

The SMT Connection Policy determines which types of connections are allowed among the four FDDI port types: A, B, M (Master), and S (Slave). FDDI protocol forbids MasterÐ>Master connections; all other connection types are legal, although some are considered to be undesirable.

Connection Policy Window

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Cabletron Systems 2.2 Connection Policy Window, Concentrator Non-M Ports, Number of MACs, MAC Path, Ring Configuration