HP StorageWorks 2/64 HP StorageWorks Fabric OS 5.x Master Glossary (AA-RW7NA-T - Page 9

domain controller An embedded port that communicates with and gets updates from the embedded ports on other switches. The well-known address is fffcdd, where dd = domain number). See well-known address. domain ID A unique identifier for each switch in a fabric. It is used in routing frames. Usually assigned by the principal switch but can be assigned manually. The domain ID for an HP StorageWorks switch can be any integer from 1 through 239. DTE Data terminal equipment. A single piece of equipment or an interconnected subsystem of multiple pieces of equipment that perform all the required functions necessary to permit users to communicate. It usually refers to a terminal. DWDM Dense wave division multiplexing. A set of technologies that allows up to 80 separate channels of data to be carried over a single fibre optical cable using different wavelengths for each channel. See WDM. ECCN Export classification control number. A government classification of encryption schemes. For example, SSH is in the high-encryption category (number 5x02), and therefore, has certain restrictions regarding transfer of encrypted data. edge fabric A Fibre Channel fabric connected to an MP Router via an EX_Port (where hosts and storage are attached in a meta-SAN). edge switch (1) A network switch used to convert LAN frames (Ethernet, and so forth) to asynchronous transfer mode (ATM) cells and vice versa. It is typically a device with one ATM port and multiple LAN ports. (2) A Fibre Channel switch used to provide user ports for servers and storage. E_D_TOV Error-detect timeout value. The minimum time a target waits for a sequence to complete before initiating recovery. Can also be defined as the maximum time allowed for a round-trip transmission before an error is declared. See also R_A_TOV, and RR_TOV. EE_Credit End-to-end credit. The number of receive buffers allocated by a recipient port to an originating port. Used by the Class 1 and 2 services to manage frame exchange across the fabric, between source and destination. See also BB_Credit, and end-to-end flow control. effective zone configuration A subset of the defined zone configuration, containing only the zone configuration object that is currently enabled. Only one configuration can be enabled at a time, but since multiple configurations can be defined in the database, a new configuration can be easily enabled. See also defined zone configuration, and zone configuration. EIA rack A storage rack that meets the standards set by the Electronics Industry Association (EIA). ELP Exchange link parameters. Used as a fabric login to exchange service parameters with another E_Port; it also helps to establish a multi-functional port's operational mode. ELS Extended link service. ELSs are sent to the destination N_Port to perform a requested function or service. A Fibre Channel standard, which is also called Fibre Channel Physical (FC_PH) ELS. EM Environmental monitor. A device that monitors FRUs and reports failures. embedded port A domain controller that communicates with and gets updates from the embedded ports on other switches. The well-known address is fffcdd, where dd = domain number. Fabric OS 5.x master glossary 9