Fabric OS Reference
Glossary-7
Multimode
A fiber optic cabling specification that allows up to 500 meters between devices.
N_Port
Node Port; a port on a node that can connect to a Fibre Channel port or to another
N_Port in a point-to-point connection. See also NL_Port, Nx_Port.
Name Server
Frequently used to indicate Simple Name Server. See also SNS.
NL_Port
Node Loop Port; a node port that has arbitrated loop capabilities. Used to connect
an equipment port to the fabric in a loop configuration through an FL_Port. See
also N_Port, Nx_Port.
Node
A Fibre Channel device that contains an N_Port or NL_Port.
Node Name
The unique identifier for a node, communicated during login and port discovery.
Non-participati
ng 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, Participating Mode.
Nx_Port
A node port that can operate as either an N_Port or NL_Port.
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.
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,
Non-participating Mode.
Path Selection
The selection of a transmission path through the fabric.
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 Topology.
Port_Name
The unique identifier assigned to a Fibre Channel port. Communicated during
login and port discovery.
POST
Power On Self-Test
; a
series of tests run by a switch after it is turned on.
Private
NL_Port
An NL_Port that communicates only with other private NL_Ports in the same
loop and does not log into the fabric.
Summary of Contents for StorageWorks 8B - FC Entry Switch
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