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

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beacon A tool in which all of the port LEDs on an MP Router are set to flash from one side of the switch
to the other, to enable identification of an individual MP Router in a large fabric. An MP Router
can be set to beacon by the beacon command.
beginning running
disparity
The disparity at the transmitter or receiver when the special character associated with an
ordered set is encoded or decoded. See also disparity.
BER Bit error rate. The rate at which bits are expected to be received in error. Expressed as the ratio
of error bits to total bits transmitted. See also error.
BISR Built-in self-repair.
BIST Built-in self-test.
bit synchronization The condition in which a receiver is delivering retimed serial data at the required bit error rate.
blind-mate
connector
A two-way connector used in some HP StorageWorks switches to provide a connection
between the motherboard and the power supply.
block As it applies to Fibre Channel technology, upper-level application data that is transferred in a
single sequence.
boot code Software that initializes the system environment during the early phase of the boot process. For
example, boot code might determine the amount of available memory and how to access it.
boot flash Flash (temporary) memory that stores the boot code.
bport Back-end port of the ASIC.
broadcast The transmission of data from a single source to all devices in the fabric, regardless of zoning.
See also multicast, unicast.
buffer-to-buffer flow
control
Management of the frame transmission rate in either a point-to-point topology or in an
arbitrated loop. See also BB_Credit.
bypass circuitry Circuits that automatically remove a device from the data path when valid signals are
dropped.
CA Certificate authority. A trusted organization that issues digital certificates. See also digital
certificate.
CAM Content-addressable memory.
CAN Campus area network. A network comprising a limited area but not just one building. See
also LAN, MAN, WAN.
cascade Two or more interconnected Fibre Channel switches. See also fabric, ISL.
CFG Configuration.
chassis The metal frame in which the switch and switch components are mounted.
CIM Common Information Model. A management structure enabling disparate resources to be
managed by a common application.
circuit An established communication path between two ports. Consists of two virtual circuits capable
of transmitting in opposite directions.
Class 1 service The class of frame-switching service for a dedicated connection between two communicating
ports (also called connection-oriented service). Includes acknowledgement of frame delivery or
nondelivery.
Class 2 service A connectionless class of frame-switching service that includes acknowledgement of frame
delivery or nondelivery.
Class 3 service A connectionless class of frame-switching service that does not include acknowledgement of
frame delivery or nondelivery. Can be used to provide a multicast connection between the
frame originator and recipients, with acknowledgement of frame delivery or nondelivery.
Class 4 service A connection-oriented service that allows fractional parts of the bandwidth to be used in a
virtual circuit.
Class 6 service A connection-oriented multicast service geared toward video broadcasts between a central
server and clients.