HP 958-000290-000 - Manual (Page 122)

Glossary–2 edge switch 2/32 installation guide
Glossary
backplane
The backplane provides 48 VDC power distribution and connections for all logic cards.
backup FRU
When an active FRU fails, an identical backup FRU takes over operation automatically
(failover) to maintain director and Fibre Channel link operation.
beaconing
Use of light-emitting diodes on ports, port cards, field-replaceable units, and directors to aid in
the fault-isolation process; when enabled, active beaconing will cause LEDs to flash for
selected components.
BB_Credit
Also known as Buffer-to-Buffer Credit. Indicates the maximum number of frames a port can
transmit without receiving a receive ready signal from the receiving device.
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
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 the director or
communicating with other devices attached to the director. A blocked port continuously
transmits the offline sequence.
bridge
Device that connects and passes packets between two network segments that use the same
communications protocol.
broadcast
Send a transmission to all N_Ports on a fabric.
broadcast frames
Data packet, also known as a broadcast packet, whose destination address specifies all
computers on a network. See also multicast.
buffer
Storage area for data in transit. Buffers compensate for differences in processing speeds
between devices. See also BB_Credit.
CHPID
See channel path identifier.