HP Brocade 8Gb SAN Switch for HP BladeSystem c-Class - Manual (Page 56)

private loop An arbitrated loop that does not include a participating FL_Port.
private NL_Port An NL_Port that communicates only with other private NL_Ports in the same loop and does not
log in to the fabric.
public device A device that supports arbitrated loop protocol, can interpret 8-bit addresses, and can log in to
the fabric.
public loop An arbitrated loop that includes a participating FL_Port and may contain both public and private
NL_Ports.
public NL_Port An NL_Port that logs in to the fabric, can function within a public or private loop, and can
communicate with private or public NL_Ports.
Q
quad A group of four adjacent ports that share a common pool of frame buffers.
R
R_A_TOV Resource allocation time-out value. The maximum time a frame can be delayed in the fabric and
still be delivered.
RAID Redundant Array of Independent Disks. A collection of disk drives that appear as a single volume
to the server and are fault tolerant through mirroring or parity checking.
request rate The rate at which requests arrive at a servicing entity.
route With respect to a fabric, the communication path between two switches. May also apply to the
specific path taken by an individual frame from source to destination.
routing The assignment of frames to specific switch ports according to frame destination.
RR_TOV Resource recovery time-out value. The minimum time a target device in a loop waits after a LIP
before logging out a SCSI initiator.
RSCN Resource recovery time-out value. The minimum time a target device in a loop
waits after a LIP before logging out a SCSI initiator.
S
SAN Storage area network. A network of systems and storage devices that
communicate using FC protocols.
SDRAM Synchronous dynamic random access memory. The main memory for a switch.
sequence A group of related frames transmitted in the same direction between two N_ports.
service rate The rate at which an entity can service requests.
single mode The fiber optic cabling standard that corresponds to distances up to 10 km between devices.
SNMP Simple Network Management Protocol. An Internet management protocol that uses either IP for
network-level functions and UDP for transport functions, or TCP/IP for both. SNMP can be made
available over other protocols (such as UDP/IP) because it does not rely on the underlying
communication protocols.
SNS Simple Name Server. A switch service that stores names, addresses, and attributes for up to 15
minutes, and provides them as required to other devices in the fabric. May also be referred to
as a directory service.
switch Hardware that routes frames according to FC protocol and is controlled by software.
switch port A port on a switch. Switch ports can be E_Ports, F_Ports, or FL_Ports.
SWL Short-wavelength. A type of fiber optic cabling that is based on 850 mm lasers and supports link
speeds up to 2 Gb/s. May also refer to the type of transceiver.
T
tenancy The time span that begins when a port wins arbitration in a loop and ends when the same port
returns to the monitoring state. Also called loop tenancy.
56 Glossary