| connects to the PCI bus of the processor. Not visible within |
| the processor’s memory space. |
configuration | The way a system is set up. May refer to hardware or software: |
| • Hardware: The number, type, and arrangement of |
| components that make up a system or network. |
| • Software: The set of parameters that guide switch operation. |
| May include general system parameters, IP address |
| information, domain ID, and other information. Modifiable |
| by any login with administrative privileges. May also refer |
| to a set of zones. |
CRC | Cyclic redundancy check. A check for transmission errors that |
| is included in every data frame. |
data word | A type of transmission word that occurs within frames. The |
| frame header, data field, and CRC all consist of data words. |
defined zone con- The set of all zone objects defined in the fabric. May | |
figuration | include multiple zone 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 | |
| for a sequence to complete before initiating recovery. Can |
| also be defined as the maximum time allowed for a |
| transmission before an error condition is declared. |
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 ISL |
| trunking, U_Port. |
EE_Credit | |
| a recipient port to an 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 storage rack that meets the standards set by the Electronics |
| Industry Association (EIA). |
78Glossary