HP StorageWorks 2/16V Brocade Glossary (53-1000040-03, November 2006) - Page 23

Glossary 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-topoint 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 entry The total number of port WWN entries for all devices defined in all active LSAN zones within a routed 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 edge fabric. LSAN zone The number of port WWN entries defined in an edge-fabric or backbone LSAN zone. See also entry backbone fabric. 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 DMM appliance. LUN mapping Mapping between a virtual iSCSI target and physical FC target. Brocade Glossary 19 Publication Number: 53-1000040-03