Fabric OS Reference Manual

288 Fabric OS Reference Manual
Multicast Transmission of data from a single source to a number of specified N_Ports.
See also Broadcast, Unicast.
Multimode Fibre-optic cabling specification allowing up to 500 meters between devices.
N_Port Node Port. Port that can attach to a fibre channel port. See also NL_Port,
Nx_Port.
Name server Service of storing names, addresses, and attributes for up to 15 minutes,
provided by a switch to other entities in fabric. Defined by fibre channel
standards, and existing at a well-known address. Also called Simple Name
Server, SNS, or directory service. See also FS.
NL_Port Node Loop Port. An N_Port that can use loop protocol. See also N_Port,
Nx_Port.
Node Fibre channel entity with one or more N_Ports or NL_Ports.
Node name Unique identifier for a node, communicated during login and port discovery.
Non-participating
mode
Mode in which L_Port is inactive in loop and cannot arbitrate or send frames,
but can retransmit received transmissions. Port enters mode if there are more
than 127 devices in loop, and an AL_PA cannot be acquired. See also
Participating mode.
Nx_Port Node port that can operate as either an N_Port or NL_Port.
Ordered set A type of transmission word that occurs outside of frames, and is used to
manage frame transport and differentiate fibre channel control information
from data. See also Data word, Transmission word.
Participating mode Mode in which an L_Port in a loop has valid AL_PA and can arbitrate, send
frames, and retransmit received transmissions. See also Non-participating
mode.
Phantom address AL_PA value assigned to device not physically in loop. Also called phantom
AL_PA.
Phantom device Device not physically in a loop but logically included by phantom address.
PLOGI Port Login. Port-to-port login process by which initiators establish sessions
with targets. See also FLOGI.
Point-to-point Two fibre channel devices connected by a direct link. See also Topology.