HP StorageWorks Fabric OS 5.X Master Glossary (AA-RW7NA-TE, September 2005)

LISA Loop-initialization soft-assigned frame. The fourth frame transmitted in the
loop initialization process after a temporary loop master has been selected.
L_Ports that have not selected an AL_PA in a LIFA, LIPA, or LIHA frame select
their AL_ PA here.
LISM Loop-initialization select master frame. This Frame applies only to the Arbitrated
Loop topology. It is the first frame transmitted in the loop initialization process
in which L_Ports select an A L_PA. LISM is used to select a temporary loop
master or the L_Por t that will subsequently start transmission of the L IFA, LIPA,
LIHA, LISA, LIRP, or LILP frames.
LM_TOV Loop master timeout value. The minimum time that the loop master waits for a
loop initialization sequence to return.
login server Theunitthatrespondstologinrequests.
loop circuit A temporary bidirectional communication path established between L_Ports.
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_ID A h exadecimal value representing one of the 127 possible AL_PA values in
an arbitrated loop.
loop initialization The logical p rocedure used by an L_Port to d iscover its environment. Can be
used to assign AL_PA addresses, detect loop failure, or reset a node.
looplet A set of devices connected in a loop to a port that is a member of another loop.
Loop Mode One of two possible modes for an L_Port, in which the L_Port is in an arbitrated
loop, using loop protocol. An L_Port in Loop Mode can also be in Par ticipating
Mode or Nonparticipating Mode.
LPB Loop port bypass. A primitive sequence
transmitted by an L_Por t to bypass one
or all L_Ports to which it is d irected. For example, if Por t A suspects that Port B
is malfunctioning, Port A can send an LPB to Port B so that Port B retransmits
everything it receives, but it is not b
e active on the loop. This sequence is used
only in arbitrated loops.
LPE Loop port enable. A primitive sequence transmitted by an L_ Port to enable
one or all L_Por ts that have been bypassed with the LPB. It is used only in
arbitrated loops.
L_Por t Loop p ort. A node port (NL_Por t) or fabric port (FL_Port) that has arbitrated-loop
capabilities. An L_Port can be in either Fabric Mode or Loop Mode.
LPSM Loop Por t State Machine. Logic that monitors and performs the tasks required
for initialization and access to the loop. It is maintained by an L_Port to track
behavior through different phases of loop op erations. Alternatively,
the logical
entity that performs arbitrated-loop p rotocols and defines the behavi
or of L_Ports
when they require access to an arbitrated loop.
LR Link reset. A primitive sequence used during link initialization bet ween two
N_Ports in point-to-point topology or an N _Port and an F_Port in fabric topology.
The expected response is an LRR.
LRR Link reset response. A primitive sequence during link initialization between two
N_Ports in point-to-point topology or an N _Port and an F_Port in fabric topology.
An LRR is sent in response to an L R.
LSAN Logical storage area network. A network that enables device and storage
connectivity that spans two or more fabrics. The path between devices in an
LSA N can be local to a fabric or cross one or m ore MP Routers and one or
more backbone fabrics.
Fabric OS 5.x master glossary
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