McDATA Enterprise Operating System, User Manual

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Glossary g-3
Glossary
BB_Credit
See buffer-to-buffer credit .
blocked port In a director or switch, the attribute that when set, removes the
communication capability of a specific port. A blocked port
continuously transmits the offline sequence.
buffer Storage area for data in transit. Buffers compensate for differences in
processing speeds between devices.
See buffer-to-buffer credit .
buffer-to-buffer credit
BB_Credit. (1) The maximum number of receive buffers allocated to a
transmitting node port (N_Port) or fabric port (F_Port). Credit
represents the maximum number of outstanding frames that can be
transmitted by that N_Port or F_Port without causing a buffer
overrun condition at the receiver. (2) The maximum number of
frames a port can transmit without receiving a receive ready signal
from the receiving device. BB_Credit can be adjustable to provide
different levels of compensation.
C
channel A point-to-point link that transports data from one point to the other.
Class 2 Fibre Channel
service
Provides a connectionless (not dedicated) service with notification of
delivery or nondelivery between two node ports (N_Ports).
Class 3 Fibre Channel
service
Provides a connectionless (not dedicated) service without notification
of delivery or nondelivery between two node ports (N_Ports).
Synonymous with datagram .
Class F Fibre Channel
service
Used by switches to communicate across interswitch links (ISLs) to
configure, control, and coordinate a multiswitch fabric.
Class of Fibre Channel
service
Defines the level of connection dedication, acknowledgment, and
other characteristics of a connection.
community profile Information that specifies which management objects are available to
what management domain or simple network management protocol
(SNMP) community name.
configuration data The collection of data that results from configuring product and
system operating parameters. For example, configuring operating
parameters, simple network management protocol (SNMP) agent,