Brocade SAN Glossary for Fabric OS v6.0.0

Brocade SAN Glossary 1/29/2008 Page 28 of 29
U
U_Port Universal Port. A port that can operate as a G/E/F/FL_Port. All Brocade 2xxx
series switches and beyond contain Universal Ports to allow any device to
connect to any port. Selection of actual port type is automatic.
UDP User Datagram Protocol. A protocol that runs on top of IP and provides port
multiplexing for upper-level protocols.
ULP Upper Level Protocol. The protocol that runs on top of Fibre Channel through
the FC-4 layer. Typical protocols are SCSI, IP, HiPPI, and IPI.
ULP_TOV Upper-Level Timeout Value. The minimum time that an SCSI ULP process
waits for SCSI status before initiating ULP recovery.
Unicast A routing method that provides one or more optimal path(s) between any two
switches in the fabric.
UTC Universal Time Conversion. Also known as “Coordinated Universal Time,” an
international time standard that is 5 hours behind Eastern Standard Time
(EST).
V
VAR Value Added Reseller.
VC Encoded PID PID format defined by the Brocade 1000 series switches.
VCSEL Vertical Cavity Surface Emitting Laser. An improved and more reliable type of
laser.
VE_Port Virtual E_Port; functions somewhat like an E_Port, but terminates at the
switch and does not propagate fabric services or routing topology
information from one edge fabric to another. The link between an E_Port and
EX_Port or VE_Port is called an Inter-Fabric Link (IFL).
VEX_Port A type of VE_Port that connects an FC router to an edge fabric.
Virtual circuit A one-way path between N_Ports that allows fractional bandwidth.
W
WAN Wide Area Network.
WAN_TOV Wide Area Network Timeout Value.
WDM Wavelength Division Multiplexer. Allows multiple wavelengths to be
combined or filtered on a single cable.
Web Tools See Brocade Web Tools.
Well-known address In Fibre Channel technology, a logical address defined by Fibre Channel
standards as assigned to a specific function and stored on the switch.