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Communications Programming Concepts


DLC FDDI Connection Contention

Dual paths to the same nodes are detected by the data link control (DLC) fiber distributed data interface (FDDI) in one of two ways. If a call is in progress to a remote node, which is also trying to call a local node, the incoming find (remote name) request is treated as if a local listen was outstanding. If a pending local listen has been acquired by a remote node's call, and the local user issues a call to that remote node after the link station is already active, a result code (DLC_REMOTE_CONN) is returned to the user along with the link station correlator of the attachment already active, so that the user can relink attachment pointers.


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