Cisco Systems 9124E LPort, Latency, Link services, Loop failure, LoopID, Loop initialization

L_Port	Loop port. A node port (NL_Port) or fabric port (FL_Port) that has arbitrated loop
	capabilities. An L_Port can be in one of two modes:
	• Fabric mode: Connected to a port that is not loop capable and is using fabric
	protocol.
	• Loop mode: In an arbitrated loop and using loop protocol. An L_Port in loop mode
	can also be in participating mode or non-participating mode. See also
	non-participating mode.
latency	The time required to transmit a frame from the time it is sent until it arrives. Together,
	latency and bandwidth define the speed and capacity of a link or system.
link	With respect to FC, a physical connection between two ports, consisting of both
	transmit and receive fibers.
link services	A protocol for link-related actions.
LIP	Loop initialization primitive. The signal that begins initialization in a loop. It indicates
	either loop failure or the resetting of a node.
LM_TOV	Loop master time-out value. The minimum time that the loop master waits for a loop
	initialization sequence to return.
loop failure	Loss of signal within a loop for any period of time; loss of synchronization for longer
	than the time-out value.
Loop_ID	A hexadecimal value representing one of the 127 possible AL_PA values in an
	arbitrated loop. See also AL_PA.
loop initialization	The logical procedure used by an L_Port to discover its environment. Can be used to
	assign AL_PA addresses, detect loop failure, or reset a node. See alsoAL_PA.
LPSM	Loop port state machine. The logical entity that performs arbitrated loop protocols and
	defines the behavior of L_Ports when they require access to an arbitrated loop. See also
	L_Port.
LWL	Long wavelength. A type of fiber optic cabling that is based on 1300 mm lasers and
	supports link speeds up to 2 Gb/s. May also refer to the type of transceiver. See also
	SWL.
master port	The port that determines the routing paths for all traffic flowing through a trunking
	group. One of the ports in the first ISL in the trunking group is designated as the master
	port for that group. See also ISL trunking.
MIB	Management Information Base. An SNMP structure to help with device management,
	providing configuration and device information. See also SNMP.
multicast	The transmission of data from a single source to multiple specified N_Ports (as opposed
	to all ports on the network).
N_Port	Node port. A port on a node that can connect to an FC port or to another N_Port in a
	point-to-point connection.
name server	A term frequently used to indicate a Simple Name Server (SNS). 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 node.

60 Glossary