HP StorageWorks XPath OS 7.4.X Command Reference Guide (AA-RVHCC-TE, September 2005)

XPath OS 7.4.x command reference guide 285
Class F service The class of frame-switching service for a direct connection between two switches, allowing
communication of control traffic between the E_Ports. Includes acknowledgement of data
delivery or nondelivery.
class of service A specified set of delivery characteristics and attributes for frame delivery.
CLI Command line interface. An interface that depends entirely on the use of commands, such as
through Telnet or SNMP, and does not involve a GUI.
client An entity that, using its common transport (CT), makes requests of a server.
CLS Close primitive signal. Used only in an arbitrated loop. Sent by an L_Port that is currently
communicating in the loop to close communication with another L_Port.
CM Central memory.
CMA Central memory architecture. An architecture centralizing memory usage in switches.
CMBISR Central memory built-in self-repair.
CMT Central memory test.
comma A unique pattern (either 1100000 or 0011111) used in 8b/10b encoding to specify
character alignment within a data stream. See also K28.5.
community (SNMP) A relationship between a group of SNMP managers and an SNMP agent, in which
authentication, access control, and proxy characteristics are defined. See also SNMP.
compact flash Flash (temporary) memory that is used in a manner similar to hard disk storage. It is connected
to a bridging component that connects to the PCI bus of the processor. Not visible within the
processor’s memory space.
configuration (1) A set of parameters that can be modified to fine-tune the operation of a switch. Use the
configShow command to view the current configuration of your switch.
(2) In zoning, a zoning element that contains a set of zones. The configuration is the
highest-level zoning element and is used to enable or disable a set of zones on the fabric. See
also zone configuration.
congestion The realization of the potential of oversubscription. A congested link is one on which multiple
devices are contending for bandwidth.
connection initiator A port that has originated a Class 1 dedicated connection and has received a response from
the recipient.
connection recipient A port that has received a Class 1 dedicated connection request and has transmitted a
response to the originator.
controller A computer module that interprets signals between a host and a peripheral device. The
controller typically is part of the peripheral device.
core PID Core switch port identifier. The core PID must be set for OS 3.1 and earlier switches included
in a fabric of 4.1 switches. This parameter is located in the configure command of
firmware versions 3.1 and earlier. All 4.1 switches and later use the core PID format by
default; this parameter is not present in the configure command for these switches.
COS Class of service.
CP Control processor.
CPLD Complex PLD. Alternately known as Enhanced PLD (EPLD), Super PAL, and Mega PAL.
CRC Cyclic redundancy check. A transmission error check that is included in every data frame.
credit As it applies to Fibre Channel technology, the number of receive buffers available to transmit
frames between ports. See also BB_Credit, EE_Credit.
cut-through A switching technique that allows the route for a frame to be selected as soon as the
destination address is received. See also route.
D_ID Destination identifier. A 3-byte field in the frame header, used to indicate the address identifier
of the N_Port to which the frame is headed.
DAS Direct attached storage.