Specifications

Glossary
975Fabric OS Version 3.1.x/4.1.x Reference Guide
ULP
Upper-level Protocol. The protocol that runs on top of Fibre Channel. Typical upper-level protocols
are SCSI, IP, HIPPI, and IPI.
Unicast
The transmission of data from a single source to a single destination.
See also broadcast, multicast.
user account
A login intended for use by the customer to monitor, but not control, switch operation.
See also account level switches.
VC
Virtual circuit. A one-way path between N_Ports that allows fractional bandwidth.
Web Tools
An HP product that runs on Fabric OS and provides a graphical interface to allow monitoring and
management of individual switches or entire fabrics from a standard workstation running a
browser.
Well-known Address
As pertaining to Fibre Channel, a logical address defined by the Fibre Channel standards as
assigned to a specific function, and stored on the switch.
Workstation
A computer used to access and manage the fabric. May also be referred to as a management station
or host.
WWN
World-Wide Name. An identifier that is unique worldwide. Each entity in a fabric has a separate
WWN.
XLWL
Xtra Long Wave Length. Laser light with a periodic length greater than 1300 nm (e.g., 1420 or
1550). XLWL lasers are used to transmit Fibre Channel data over distances greater than 10 Km.
Also known as ELWL.
Xmitted Close State
The state in which an L_Port cannot send messages, but can retransmit messages within the loop.
A port in the XMITTED CLOSE state cannot attempt to arbitrate.