director 2/64 service manual

Glossary–2 director 2/64 service manual
Glossary
audit log
Log summarizing actions (audit trail) made by the user.
authentication
Verification of identity for a person or process.
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. Contrast with active FRU.
BB_Credit
See buffer-to-buffer credit.
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 causes LEDs to flash for selected
components.
BER
See bit error rate.
bidirectional
In Fibre Channel, the capability to simultaneously communicate at maximum speeds 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 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. See also multicast.