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Buffer-to-buffer flow control – HP Brocade 4Gb SAN Switch for HP BladeSystem p-Class User Manual

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Fabric OS 5.0.0 procedures user guide 245

block

As applied to Fibre Channel technology, upper-level application data that is transferred in a single sequence.

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.

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.

class of service

A specified set of delivery characteristics and attributes for frame delivery.

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 to another L_Port.