Technical data

Glossary-6 Brocade SilkWorm 4100 Hardware Reference Manual
Publication Number: 53-0000563-02
(2) In Brocade Zoning, a zoning element that contains a set of zones. The Configuration is the highest-
level zoning element and is used to enable or disable a set of zones on the fabric. See also zone
configuration.
congestion The realization of the potential of oversubscription. A congested link is one on which multiple devices
are contending for bandwidth.
connection
initiator
A port that has originated a Class 1 dedicated connection and received a response from the recipient.
connection
recipient
A port that has received a Class 1 dedicated connection request and transmitted a response to the
originator.
core PID Core switch port identifier. The core PID must be set for v3.1 and earlier switches included in a fabric of
v4.1 switches. This parameter is located in the configure command of firmware versions v3.1 and
earlier. All v4.1 switches and above use the core PID format by default; this parameter is not present in
the configure command for these switches.
COS Class of service.
CP Control processor.
CPLD Complex PLD. Alternately known as “Enhanced PLD (EPLD),” “Super PAL,” and “Mega PAL.”
credit As it applies to Fibre Channel technology, the number of receive buffers available to transmit frames
between ports. See also BB_Credit, EE_Credit.
CSCN Common services connection framework.
cut-through A switching technique that allows the route for a frame to be selected as soon as the destination address
is received. See also route.
D
D_ID Destination identifier. A 3-byte field in the frame header, used to indicate the address identifier of the
N_Port to which the frame is headed.
DAS Direct attached storage.
data word A type of transmission word that occurs within frames. The frame header, data field, and CRC all
consist of data words. See also frame, ordered set, transmission word.
datagram A Class 3 Fibre Channel service that allows data to be sent quickly to devices attached to the fabric,
without receipt confirmation.
DCC Direct cable connection. DCC does not require network interface cards (NICs), making it relatively
inexpensive and simple; however, it provides a limited connection between two PCs, and the data
transfer rate is slower than with a true LAN.
DCE Data Communications Equipment. Usually refers to a modem.