| defined zone | The set of all zone objects defined in the fabric. May include multiple zone | 
| configuration | configurations. See also zone, zone configuration. | 
| directory service | See SNS. | 
| DLS | Dynamic load sharing. Dynamic distribution of traffic over available paths. Allows for | 
| 
 | recomputing of routes when an Fx_Port or E_Port changes status. | 
| domain ID | Unique identifier used in routing frames for all switches in a fabric. Usually assigned by | 
| 
 | the principal switch, but can be assigned manually. The domain ID for an HP switch | 
| 
 | can be any integer between 1 and 239. The default domain ID is usually 1. | 
| E_D_TOV | |
| 
 | before initiating recovery. Can also be defined as the maximum time allowed for a | 
| 
 | |
| E_Port | Expansion port. A type of switch port that can be connected to an E_Port on another | 
| 
 | switch to create an ISL. See also U_Port. | 
| EE_Credit | |
| 
 | originating port. Used by Class 1 and Class 2 services to manage the exchange of | 
| 
 | frames across the fabric between source and destination. | 
| EIA rack | A equipment storage rack that meets the standards set by the EIA (Electronics Industry | 
| 
 | Association ). | 
| enabled zone | The currently enabled configuration of zones. Only one configuration can be enabled | 
| configuration | at a time. See also zone,zone configuration. | 
| 
 | A facility that governs flow of class 1 and class 2 frames | 
| control | between N_Ports. | 
| error | With respect to FC, a missing or corrupted frame,  | 
| 
 | loss of signal (link error). | 
| exchange | The  | 
| 
 | of one or more related sequences; can work in one or both directions. | 
| F_Port | Fabric port. A port that is able to transmit under fabric protocol and interface over | 
| 
 | links. Can be used to connect an N_Port to a switch. See also U_Port. | 
| fabric | An FC network containing two or more switches in addition to hosts and devices. May | 
| 
 | also be called a switched fabric. | 
| fabric name | The unique identifier assigned to a fabric and communicated during login and port | 
| 
 | discovery. | 
| FCIA | Fibre Channel Industry Association. An international organization of FC industry | 
| 
 | professionals. Among other things, provides oversight of ANSI and industry standards. | 
| FCP | Fibre Channel Protocol. Mapping of protocols onto the FC standard protocols. For | 
| 
 | example, SCSI FCP maps  | 
| FCS switch | Fabric Configuration Server switch. One or more designated HP switches that store and | 
| 
 | manage the configuration and security parameters for all switches in the fabric. | 
58 Glossary
