HP StorageWorks 2/16V Brocade Glossary (53-1000040-03, November 2006) - Page 13

Glossary ELS Extended link service. ELSs are sent to the destination N_Port to perform the requested function or service. ELS is a Fibre Channel standard that is sometimes referred to as "Fibre Channel Physical (FC_PH) ELS." EM Environmental monitor. A daemon in the Fabric OS that monitors hardware components and FRUs and reports failures. See also FRU. embedded port An embedded port (or domain controller) communicates and get updates from other switches' embedded ports. The well-known address is fffcdd, where dd = domain number. EMI Electromagnetic interference. enabled zone The currently enabled configuration of zones. Only one configuration can be enabled at a time. See also configuration defined zone configuration and zone configuration. end-to-end Governs flow of Class 1 and 2 frames between N_Ports. See also EE_Credit. flow control entry fabric The basic Brocade software license that allows one E_Port per switch. EOF End of frame. A group of ordered sets used to mark the end of a frame. ePair See extent pair. error In Fibre Channel terminology, a missing or corrupted frame, timeout, loss of synchronization, or loss of signal (link errors). See also loop failure. Ethernet A popular LAN protocol. EVMd Event management database. Delivers FDMI-related events. EX_Port A type of E_Port that connects an FC router to an edge fabric. From the point of view of a switch in an edge fabric, an EX_Port appears as a normal E_Port. It follows applicable Fibre Channel standards as other E_Ports. However, the router terminates EX_Ports rather than allowing different fabrics to merge as would happen on a switch with regular E_Ports. exchange The highest-level Fibre Channel mechanism used for communication between N_Ports. Composed of one or more related sequences, it can work in either one or both directions. exchangebased routing A routing policy in which the choice of routing path is based on the S_ID, D_ID, and Fibre Channel originator exchange ID (OX_ID), optimizing path utilization for the best performance. Thus, every exchange can take a different path through the fabric. This routing policy is the default on the SilkWorm 200E, 4100, 4900, AP7420, 7500, and 48000 (using configuration option 5). See also device-based routing and port-based routing. explicit list In AD0, consists of any members in the AD0 that have been intentionally added to another Admin Domain. These members are automatically deleted from the implicit list, but members of the explicit list are not deleted when they are assigned to other ADs. See also AD0 and implicit list. exported A device that has been mapped between fabrics (a host or storage port in one edge fabric can be device exported to any other fabric including backbone by using LSAN zoning). Brocade Glossary 9 Publication Number: 53-1000040-03