HP StorageWorks 2/140 CLI reference guide for directors and edge switches - Page 194

Glossary beaconing Use of light-emitting diodes on ports, port cards, field-replaceable units, Directors, and Edge Switches to aid in the fault-isolation process; when enabled, active beaconing causes LEDs to flash for selected components. BB_Credit See buffer-to-buffer credit. BER See bit error rate. bidirectional In Fibre Channel, the capability to simultaneously communicate at maximum speeds (100 Mbps) in both directions over a link. bit error rate (BER) Ratio of received bits that contain errors to total of all bits transmitted. blocked port Devices communicating with the port are prevented from logging into a Director or Edge Switch; or communicating with other devices attached to the Director or Edge Switch. A blocked port continuously transmits the offline sequence. broadcast Send a transmission to all N_Ports on a fabric. See also multicast. broadcast frames Data packet, also known as a broadcast packet, whose destination address specifies all computers on a network. buffer Storage area for data in transit. Buffers compensate for differences in processing speeds between devices. See also buffer-to-buffer credit. buffer-to-buffer credit (BB_Credit) See buffer-to-buffer credit. Indicates the maximum number of frames a port can transmit without receiving a receive ready signal from the receiving device. call-home Product feature which requires installation of HP Proactive Service software and enables the HAFM server to automatically transmit system events (failure information) to an HP customer support center. The HP support center server accepts calls from the HAFM server, logs reported events, and can notify one or more support center representatives. channel A point-to-point link that transports data from one point to the other. Glossary-2 CLI reference guide for directors and edge switches