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Glossary-10 Fabric Watch User’s Guide
Tunneling
A technique for enabling two networks to communicate when the source and
destination hosts are both on the same type of network, but are connected by a
different type of network.
U_Port
Universal Port; a switch port that can operate as a G_Port, E_Port, F_Port, or
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.
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. Typical
upper-level protocols are SCSI, IP, HIPPI, and IPI.
ULP_TOV
Upper-level Time-out Value; the minimum time that a SCSI ULP process waits
for SCSI status before initiating ULP recovery.
Unicast
The transmission of data from a single source to a single destination. See also
Broadcast, Multicast.
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
Worldwide Name; an identifier that is unique worldwide. Each entity in a fabric
has a separate WWN.
Zone
A set of devices and hosts attached to the same fabric and configured as being in
the same zone. See also Brocade Zoning. Devices and hosts within the same zone
have access permission to others in the zone, but are not visible to any outside the
zone.
Zone
Configuration
A specified set of zones. Enabling a configuration enables all zones in that
configuration. See also Defined Configuration, Enabled Configuration.