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Departmental Switch Models DS-16B and DS-8B Web Tools User Guide
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Glossary
Q
QuickLoop
TM
Can indicate either the DS-16B and DS-8B product that allows private
devices within loops to communicate over the fabric with other
devices, or the set of actual devices or looplets connected in a loop by
the QuickLoop technology. All devices in a QuickLoop share a single
AL PA space and behave as if they are in one loop.
R
R_A_TOV Resource Allocation Time-out Value. Maximum time a frame can be
delayed in the fabric and still be delivered. See also E_D_TOV.
RAID Redundant Array of Independent Disks. Collection of disk drives that
appear as a single volume to the server, and are fault-tolerant through
mirroring or parity checking. See also JBOD.
Route As applies to fabric, a communication path between two switches.
Routing is the assignment of Class 2 or 3 frames to the most
appropriate switch ports for the intended destinations. See also FSPF.
RSCN Registered State Change Notification. Switch function that sends
notification of fabric changes from the switch to specified nodes.
S
SAN Storage Area Network. Network of systems and storage devices that
usually communicate using fibre channel protocols. See also Fabric.
Sequence A fibre channel structure containing one or more frames transmitted
in a unidirectional manner between N_Ports. See also Exchange,
Frame.
Single mode Fibre-optic cabling standard that provides for distances of up to 10
kilometers between devices.
SNMP Simple Network Management Protocol. Internet management
protocol that does not rely on underlying communication protocols
and can therefore be made available over other protocols, such as
UDP/IP. Uses IP for network layer functions and UPD for transport
layer function, or TCP/IP for both. See also Community (SNMP).
SNS Simple Name Server. See Name server.