Brocade Communications Systems SilkWorm 3800, Hardware Reference Manual, Page: 56 / 62

Glossary-10 SilkWorm 3800 Hardware Reference
switch port
A port on a switch. Switch ports can be E_Ports, F_Ports, or FL_Ports.
SWL
Short wavelength. A type of fiber optic cabling that is based on 850mm lasers and
supports link speeds up to 2 Gbit/sec. May also refer to the type of transceiver.
See also LWL.
target
A storage device on a fibre channel network. See also initiator.
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 bps (bits per second). See also bandwidth.
topology
As applies to fibre channel, the configuration of the fibre channel network and the
resulting communication paths allowed. There are three possible topologies:
•
Point to point: A direct link between two communication ports.
•
Switched fabric: Multiple N_Ports linked to a switch by F_Ports.
•
Arbitrated loop: Multiple NL_Ports connected in a loop.
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
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. See also SNMP.
trunking
See ISL trunking.
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.
user flash See kernal flash.
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.