IBM AA-RWF3A-TE manual configuration, trunking, UPort, 148Glossary

CRC	Cyclic redundancy check. A check for transmission errors that
	is included in every data frame.
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	Error-detect time-out 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 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	End-to-end credit. The number of receive buffers allocated by
	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.
enabled zone con-	The currently enabled configuration of zones. Only one
figuration	configuration can be enabled at a time. See also zone, zone
	configuration.
end-to-end flow	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, time-out, loss
	of synchronization, or loss of signal (link error).
exchange	The highest-level FC mechanism used for communication
	between N_Ports. Composed 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.

148Glossary