HP StorageWorks 4/16 Brocade SAN Glossary for Fabric OS v6.0.0 - Page 22

Prohibit Dynamic Connectivity Mask (PDCM) A method for isolating traffic used for specific forced network control, for example, to route traffic to a particular EX_Port in an M-EOS edge fabric; lets you define which ingress port will take which egress port; configuration must be performed at the director level. Proxy device A virtual device present in a local fabric that represents a physical device connected to a different edge fabric. From the perspective of the local device that is physically connected to a fabric, a proxy device is considered to be "imported"; from the perspective of the remote fabric, the proxy device is said to be "exported." PSU Power Supply Unit. Public device A device that supports loop and can also log in to the fabric. Public key cryptography A type of cryptography that uses a key pair, with the two keys in the pair (public and private) called at different points in the algorithm. Public loop An Arbitrated Loop with a participating FL_Port. Public loop device An Arbitrated Loop device that supports fabric login and services. Public NL_Port An NL_Port that can communicate with other ports on the loop as well as through an FL_Port to other N_Ports on the fabric. Q QLogic A brand of host bus adapters and switches. Quality of Service (QoS) An optionally licensed fabric service introduced in Fabric OS 6.0that allows you to assign different priority to different applications, users, or data flows, or to guarantee a certain level of performance to a data flow between a given host-target pair. You assign high or low priority (QoS level) using a special QoS zone.See also Adaptive Networking, SID, and DID. Queue A mechanism for each AL_PA address that allows for collecting frames prior to sending them to the loop. QuickLoop A Brocade software product that allows multiple ports on a switch to create a logical loop. Devices connected via QuickLoop will appear to each other as if they were on the same Arbitrated Loop. QuickLoop mode Allows initiator devices to communicate with private or public devices that are not in the same loop. R R_A_TOV R_CTL R_RDY Resource Allocation Timeout Value. Used to time out operations that depend on the maximum allowable time a frame could be delayed in the fabric and still be delivered. Route Control. The first 8 bits of a header, which defines the type of frame and its contents. Receiver Ready. A primitive signal indicating that the port is ready to receive a frame. Brocade SAN Glossary 1/29/2008 Page 22 of 29