HP StorageWorks Multi-protocol Router Installation Guide (A7437-96003, September 2005)

Multi-protocol router installation guide 101
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.
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.
M
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.
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).
N
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.
name server Frequently used to indicate Simple Name Server.
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.
node A fibre channel device that contains an N_Port or NL_Port.
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.
Nx_Port A node port that can operate as either an N_Port or NL_Port.