HP StorageWorks 4/32 Brocade SAN Glossary for Fabric OS v6.0.0 - Page 7

Disparity The relationship of 1s and 0s in an encoded character; positive disparity contains more 1s, negative disparity contains more 0s, neutral disparity contains an equal number of 1s and 0s. DLS Dynamic Load Sharing. Allows for recomputing of routes when an Fx_Port or E_Port comes up or down. Domain ID A unique number between 1 and 239 on a Brocade 2000 Series or later switch that identifies the switch to a fabric. Dynamic Ports On Demand (DPOD) Automatically enables ports on an embedded blade when the server is powered on and does not require a predefined assignment of port; determined by the total number of ports in use and the number of purchased dynamic ports. DWDM Dense Wave Division Multiplexing..Allows more wavelengths to use the same fiber. See WDM. E 8b/10b encoding An encoding scheme that converts an 8-bit byte into one or two possible 10bit characters; used for balancing 1s and 0s in high-speed transports. ECCN Export Classification Control Number. A government classification of encryption, for example, SSH is in the high-encryption category and therefore has certain restrictions regarding its transfer. Edge fabric A Fibre Channel fabric connected to an FC router via an EX_Port (where hosts and storage are typically attached in a metaSAN). E_D_TOV Error-Detect Time Out Value. The maximum round-trip time that an operation could require before declaring an error condition. Effective zone configuration A subset of the defined zone configuration, containing only the zone configuration objects that are currently enabled; only one configuration can be active at a time, but multiple configurations can be defined in the database. EE_Credit End-to-End Credit. Used to manage the exchange of frames by two communicating devices and set the maximum number of frames that may remain unacknowledged. Enterprise Fabric Connectivity Manager (EFCM) See Brocade Enterprise Fabric Connectivity Manager. E_Port A standard Fibre Channel mechanism that enables switches to network with each other. EIA Electronic Industries Association. ELP Exchange Link Parameters. ELS Extend Link Service. Sent to the destination N_Port to perform the requested function or service. ELS is a Fibre Channel standard sometimes referenced as "Fibre Channel Physical (FC_PH) ELS." Brocade SAN Glossary 1/29/2008 Page 7 of 29