HP 316095-B21 - StorageWorks Edge Switch 2/24 Manual page 6

Glossary
BB_Credit
See buffer-to-buffer
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.
bezel
A removable panel that covers empty drive bays and port cards.
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 connection
In S/390 mode, in a director or switch, the attribute that, when set, removes the communication
capability of a specific port. A blocked address is disabled so that no other address can be
connected to it. A blocked attribute supersedes a dedicated or prohibited attribute on the same
address. See also allowed
connectivity.
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.
B_Port
See bridge port.
bridge
Device that connects and passes packets between two network segments that use the same
communications protocol.
bridge port
(B_Port) — (1) In Fibre Channel protocol, a fabric inter-element port used to connect bridge
devices with E_Ports on a switch. B_Ports provide a subset of E_Port functionality. (2) A term
for a physical interface between the fabric (switch) and a bridge device. The interface is
identical to an expansion port (E_Port), but it does not participate in full expansion port
protocols. As such, it does not assign domain IDs or participate in routing protocol. See also
expansion port, fabric
6
credit.
connection, connectivity
port, generic port,
attribute, dynamic
node port, and segmented
connection, and
E_Port.
Directors and Edge Switches Glossary
dynamic