Owner's manual

Advanced Performance Monitoring User’s Guide 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.