Brocade Glossary (53-1000040-03, November 2006)

Brocade Glossary 23

Publication Number: 53-1000040-03

Glossary

OX_ID Originator ID or exchange ID. Refers to the exchange ID assigned by the originator port.

packet A set of information transmitted across a network. See also frame.

PAL Programmable Array Logic. A relatively small FPD.

parallel The simultaneous transmission of data bits over multiple lines.

Participating

mode

A mode in which an L_Port in a loop has a valid AL_PA and can arbitrate, send frames, and retransmit

received transmissions. See also L_Port and Nonparticipating mode.

passive

copper

A low-cost copper Fibre Channel connection, allowing distances up to 13 m between devices.

path selection The selection of a transmission path through the fabric. Brocade switches use the FSPF protocol. See

also FSPF.

payload A Fibre Channel frame has a header and a payload. The payload contains the information being

transported by the frame; it is determined by the higher-level service or FC_4 upper-level protocol.

There are many different payload formats, based on protocol. See also header.

PBC Port bypass circuit. A circuit in hubs or a disk enclosure to open or close a loop to add or remove SAN

devices.

PCBA Printed circuit board assembly.

PCM Pulse-code modulation. A standard method of encoding analog audio signals in digital form.

Performance

Monitoring

A Brocade SilkWorm switch feature that monitors port traffic and includes frame counters, SCSI read

monitors, SCSI write monitors, and other types of monitors.

persistent In Brocade products, a configuration that remains in place over a reboot or power cycle of the switch or

director.

phantom

address

A PID value that is assigned to a device that is not physically in a loop.

phantom

device

A device that is not physically in an arbitrated-loop but is logically included through the use of a

phantom address.

phantom

domain ID

Domain ID used for importing devices into edge or backbone fabrics.

physical fabric In administrative domains, the unfiltered view of the actual fabric. At the physical fabric level, you can

see a hierarchical view of zoning, but you cannot make changes. See also AD255.

PID Port identifier. See also VC Encoded PID, native PID, core PID, and extended edge PID.