HP StorageWorks Fabric OS 5.0.0 MIB Reference Guide (AA-RW1QA-TE, May 2005)

274 Glossary
beacon
A tool in which all of the port LEDs on a switch are set to flash from one side of the switch to the other, to enable
identification of an individual switch in a large fabric. A switch can be set to beacon by a CLI command or through
HP Advanced Web Tools.
BISR
Built-in self-repair.
BIST
Built-in self-test.
broadcast
The transmission of data from a single source to all devices in the fabric, regardless of zoning. See also multicast.
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.
cascade
Two or more interconnected Fibre Channel switches. HP StorageWorks 2 GB switches and later switches can be
cascaded up to 239 switches, with a recommended maximum of seven interswitch links (no path longer than eight
switches). See also fabric, ISL.
CHAP
Challenge-Handshake Authentication Protocol. Allows remote servers and clients to securely exchange authentication
credentials. Both the server and client are configured with the same shared secret.
chassis
The metal frame in which the switch and switch components are mounted.
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.
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.