HP StorageWorks Multi-protocol Router Installation Guide (A7437-96003, September 2005)

Glossary98
D
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
configuration
The set of all zone objects defined in the fabric. May include multiple zone
configurations.
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 for all switches in a fabric, used in routing frames. Usually
automatically 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. Generally, the
default domain ID is 1.
E
E_D_TOV Error detect time-out value. The minimum amount of 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 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.
EE_Credit End-to-end credit. The number of receive buffers allocated by a recipient port to an
originating port. Used by Class 1 and 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.
enabled zone
configuration
The currently enabled configuration of zones. Only one configuration can be enabled
at a time.
end-to-end flow
control
Governs flow of class 1 and 2 frames between N_Ports.
error As applies to fibre channel, a missing or corrupted frame, time-out, loss of
synchronization, or loss of signal (link errors).
exchange The highest level fibre channel mechanism used for communication between N_Ports.
Composed of one or more related sequences, and can work in either one or both
directions.