IBM SAN16B-2 - TotalStorage Express Model Switch, Руководство пользователя и обслуживания

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switch. Hardware that routes frames according to
Fibre Channel protocol and is controlled by software.
switch name. The arbitrary name assigned to a
switch.
switch port. A port on a switch. Switch ports can be
expansion ports (E_ports), fabric ports (F_ports), or
fabric loop ports (FL_ports).
SWL. See short wavelength .
synchronous dynamic random access memory
(SDRAM). The main memory for the switch. Used for
volatile storage during switch operation.
T
target. A storage device on a Fibre Channel network.
See also initiator .
TCP. See transmission control protocol .
tenancy. The time from when a port wins arbitration in
a loop until the same port returns to the monitoring
state. Also referred to as loop tenancy.
throughput. The rate of data flow achieved within a
cable, link, or system. Usually measured in bits per
second (bps). See also bandwidth .
topology. As applies to fibre channel, the configuration
of the Fibre Channel network and the resulting
communication paths allowed.
transceiver. A device that converts one form of
signaling to another for transmission and reception; in
fiber optic applications, optical and electrical signals are
converted.
translative mode. A mode in which private devices
can communicate with public devices across the fabric.
transmission character. A 10–bit character encoded
according to the rules of the 8b/10b algorithm.
Transmission control protocol (TCP). A
communications protocol used in the Internet and in any
network that follows the Internet Engineering Task Force
(IETF) standards for Internet protocol.
transmission word. A group of four transmission
characters.
trap (SNMP). The message sent by a simple network
management protocol (SNMP) agent to inform the
SNMP management station of a critical error. See also
simple network management protocol .
tunneling. A technique for enabling two networks to
treat a transport network as though it were a single
communication link or local area network (LAN).
Tx. Transmitted.
U
U. Unit of measure for rack-mounted equipment.
UDP. See user datagram protocol .
ULP. See upper-level protocol .
ULP_TOV. See upper-level timeout value .
unicast. The transmission of data from a single source
to a single destination. See also broadcast and
multicast .
universal port (U_port). A switch port that can
operate as a generic port (G_port), expansion port
(E_port), fabric port (F_port), or fabric loop port
(FL_port). A port is defined as a U_port when it is not
connected or has not yet assumed a specific function in
the fabric.
U_port. See universal port .
upper-level protocol (ULP). The protocol that runs on
top of Fibre Channel. Typical upper-level protocols are
small computer system interface (SCSI), Internet
protocol (IP), HIPPI, and IPI.
upper-level timeout value (ULP_TOV). The minimum
time that a small computer system interface (SCSI)
upper-level protocol (ULP) process waits for SCSI
status before initiating ULP recovery.
user datagram protocol (UDP). A protocol that runs
on top of Internet protocol (IP) and provides port
multiplexing for upper-level protocols.
V
VC. See virtual circuit .
VCCI. Voluntary Control Council for Interference
virtual circuit (VC). A one-way path between node
ports (N_ports) that allows fractional bandwidth.
W
WAN. See wide area network .
WDM. Wave division multiplexing. Allows multiple
wavelengths to be combined or filtered on a single
cable.
well-known address. As it pertains to fibre channel, a
logical address defined by the Fibre Channel standards
as assigned to a specific function, and stored on the
switch.
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SAN16B-2 Installation, Service, and User’s Guide