HP StorageWorks XPath OS 7.4.X Administrator Guide (AA-RVHDD-TE, February 2006)

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core PID
Core switch port identifier. The core PID must be set for Fabric OS 3.1 and earlier switches included in a
fabric of Fabric OS 4.1 switches. This parameter is located in the configure command of Fabric OS 3.1
and earlier. All Fabric OS 4.1 switches and later use the core PID format by default; this parameter is not
present in the configure command for these switches.
credit
In Fibre Channel technology, the number of receive buffers available to transmit frames between ports. See
also buffer-to-buffer flow control.
D_ID
Destination identifier. A three-byte field in the frame header that indicates the address identifier of the
N_Port to which the frame is headed.
defined zone configuration
The set of all zone objects defined in the fabric. Can include multiple zone configurations. See also
enabled zone configuration, zone configuration.
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. See also Fx_Port, E_Port.
domain ID
A unique identifier for all switches in a fabric, used in routing frames. Usually assigned by the principal
switch, but can be assigned manually. The domain ID for an HP StorageWorks switch can be any integer
from 1 through 239.
E_D_TOV
Error-detect timeout 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
is declared. See also R_A_TOV.
E_Port
Expansion port. A standard Fibre Channel mechanism that enables switches to network with each other,
creating an ISL. See also ISL.
edge fabric
A Fibre Channel fabric connected to an FC router through an EX_Port (where hosts and storage are
attached in a meta-SAN). See also EX_Port.
enabled zone configuration
The currently enabled configuration of zones. Only one configuration can be enabled at a time. See also
defined zone configuration, zone configuration.
EX_Port
A type of E_Port that connects an FC router to an edge fabric. EX_Ports limit the scope of fabric services,
but provide device connectivity using FC-NAT.
exchange
The highest-level Fibre Channel mechanism used for communication between N_Ports. Composed of one
or more related sequences, it can work in either one or both directions. See also N_Port.