User's Manual

RSCN Registered state change notification. A switch function that allows notification of
fabric changes to be sent from the switch to the specified nodes.
SAN Storage area network. A net work of systems and storage devices that
communicate using FC protocols.
SDRAM Synchronous dynamic random access memory. The main memory for a switch.
See also ???.
sequence A g roup 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 P rotocol. An Internet ma nag em ent 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.
See also ???, ???.
SNS Simple Name Server. A switch service that stores names, addresses, and
attr ibutes for up to 15 minutes, and provides them as required to other devices in
thefabric. Mayalsobereferredtoasadirectory service.
switch Hardware that routes frames according to FC protocol and is controlled by
softwar e.
switch port A port on a switch. Switch p orts can be E _Ports, F _Ports, or FL_Ports.
SWL short-wavelength. A type of fiber optic cabling that is based on 850 m m lasers
and supports link speeds up to 2 Gb/s. May also refer to the t ype of transceiver.
tenancy The time span that begins when a port wins arbitra tion in a loop and ends when
the same port returns to the monitoring state. Also called loop tenancy.
throughput The rate of data flow achieved within a cable, link, or system. Usually measured
in bits per second (b/s).
topology With respe ct to FC, the configuration of the FC net work and the resulting
communication paths allowed. There are three possible topologies:
• Point-to-point: A direct link between two communication ports
• Switched fabric: Multiple N_Ports linked to a switch by F_Ports
• Arbitrated loop: Multiple NL_Ports connected in a loop
transmission
character
A 10-bit character encoded according to the rules of the 8b/10b algorithm.
transmission word A g roup of transmission characters.
trap (SNMP) The message sent by an SNMP agent to inform the SNMP management station
of a critical error. See also ???.
U_Port Universal por t. A switch port that can operate as a G_Port, E_Port, F_ Port, or
FL_Port. A port is defined as a U_Por t when it is not connected or has not yet
assumed a specificfunctioninthefabric.See also ???, ???, ???.
well-known
address
With respect to FC, a logical address defined by the FC standards as assigned
to a specific function and stored on the switch.
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Glossary