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SilkWorm 3800 Hardware Reference Glossary-7
link services
A protocol for link-related actions.
LIP
Loop initialization primitive. The signal used to begin initialization in a loop.
Indicates either loop failure or 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, or loss of synchronization for
longer than the time-out value.
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.
Loop_ID
A hex value representing one of the 127 possible AL_PA values in an arbitrated
loop.
looplet
A set of devices connected in a loop to a port that is a member of another loop.
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.
LWL
Long wavelength. A type of fiber optic cabling that is based on 1300mm lasers
and supports link speeds up to 2 Gbit/sec. 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 that is 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.
multicast
The transmission of data from a single source to multiple specified N_Ports
(as opposed to all the ports on the network). See also broadcast, unicast.
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-
participating
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.