HP StorageWorks 2/32 - SAN Switch Installation Manual page 121

Glossary
Transmission Character
A 10-bit character encoded according to the rules of the 8B/10B algorithm.
Transmission Word
A group of four transmission characters.
Trap (SNMP)
The message sent by an SNMP agent to inform the SNMP management station of a critical
error.
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_TOV
Upper-level Time-out Value; the minimum time that a SCSI ULP process waits for SCSI
status before initiating ULP recovery.
ULP
Upper-level Protocol; the protocol that runs on top of Fibre Channel. Typical upper-level
protocols are SCSI, IP, HIPPI, and IPI.
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.
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.
SAN Switch 2/32 Installation Guide 121