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Departmental Switch Model DS-16B2 Fabric OS Procedures Manual
g-11
Glossary
Nonparticipating
Mode
A mode in which an L_Port in a loop is inactive and cannot arbitrate
or send frames, but can retransmit any received transmissions. This
mode is entered if there are more than 127 devices in a loop and an
AL_PA cannot be acquired. See also L_Port and Participating Mode.
Nx_Port A node port that can operate as either an N_Port or NL_Port.
O
Ordered Set A transmission word that uses 8B/10B mapping and begins with the
K28.5 character. Ordered sets occur outside of frames, and include the
following items:
• Frame delimiters mark frame boundaries and describe frame
contents.
• Primitive signals indicate events.
• Primitive sequences indicate or initiate port states.
Ordered sets are used to differentiate Fibre Channel control
information from data frames and to manage the transport of frames.
P
Packet A set of information transmitted across a network. See also Frame.
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.
Path Selection The selection of a transmission path through the fabric. EMC switches
use the FSPF protocol.
Phantom Address An AL_PA value that is assigned to an device that is not physically in
the loop. Also known as phantom AL_PA.
Phantom Device A device that is not physically in an arbitrated loop but is logically
included through the use of a phantom address.
PLOGI Port Login; the port to port login process by which initiators establish
sessions with targets. See also FLOGI.
Point to point A Fibre Channel topology that employs direct links between each
pair of communicating entities. See also Top olo gy.