Brocade Communications Systems A7990A - StorageWorks SAN Director 4/16 Blade Switch Manual page 23

loop failure
Loss of signal within a loop for any period of time, or loss of synchronization for longer than the
timeout value.
Loop_ID
A hexadecimal value representing one of the 127 possible AL_PA values in an arbitrated loop.
loop The logical procedure used by an L_Port to discover its environment. Can be used to assign AL_PA
initialization addresses, detect loop failure, or reset a SAN device.
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 Participating mode or Nonparticipating mode.
looplet
A set of devices connected in a loop to a port that is a member of another loop.
LPB Loop port bypass. A primitive sequence transmitted by an L_Port to bypass one or all L_Ports to which
it is directed. It is used only in arbitrated loops.
LPE
Loop port enable. A primitive sequence transmitted by an L_Port to enable one or all L_Ports that have
been bypassed with the LPB. It is used only in arbitrated loops.
LPSM
Loop Port 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
operations. Alternatively, the logical entity that performs arbitrated-loop protocols and defines the
behavior of L_Ports when they require access to an arbitrated loop.
LR
Link reset. A primitive sequence used during link initialization between 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. It is sent in response to an LR and expects
a response of Idle.
LSAN
Logical storage area network. An LSAN enables device and storage connectivity that spans two or more
fabrics. The path between devices in an LSAN can be local to a fabric or cross one or more FC routers
and one or more backbone fabrics.
LSAN device
The total number of port WWN entries for all devices defined in all active LSAN zones within a routed
entry
fabric. For example, if Fabric 1 has lsan_zone 1 with devices A and B and Fabric 2 has lsan_zone 2with
devices A and B, four LSAN entries are consumed.
LSAN zone
Any zone defined in an edge fabric in which the zone name is prefixed with the tag LSAN_. The LSAN_
tag is not case sensitive. LSAN zones are a way to specify interfabric connectivity and the creation of
proxy devices. For example, if Fabric 1 has lsan_zone 1 with devices A and B and Fabric 2 has
lsan_zone 2 with devices A and B, two LSAN zone entries are consumed. See also
LSAN zone
The number of port WWN entries defined in an edge-fabric or backbone LSAN zone. See also
entry
backbone
LU path
In DMM identifies a path to a logical unit. It is the port WWN (pWWN) of the array and the logical unit
number from the standpoint of the virtual initiators. See also
LUN mapping Mapping between a virtual iSCSI target and physical FC target.
Brocade Glossary
Publication Number: 53-1000040-03
fabric.
Glossary
edge
DMM appliance.
fabric.
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