HP 316095-B21 - StorageWorks Edge Switch 2/24 User Manual page 223

latency
When used in reference to a Fibre Channel switching device, latency refers to the amount of
time elapsed between receipt of a data transmission at a Switch's incoming F_Port (from the
originating node port) to retransmission of that data at the Switch's outgoing F_Port (to the
destination N_Port). The amount of time it takes for data transmission to pass through a
switching device.
LIN
See link incident.
link
Physical connection between two devices on a switched fabric.
link incident
Interruption to link due to loss of light or other causes.
load balancing
Ability to evenly distribute traffic over multiple interswitch links within a fabric. Load
balancing on HP Directors takes place automatically.
logical unit number
Also known as LUN. In Fibre Channel addressing, a logical unit number is a number assigned
to a storage device which, in combination with the storage device's node port's World Wide
Name, represents a unique identifier for a logical device on a storage area network.
loopback plug
In a fiber optic environment, a type of duplex connector used to wrap the optical output signal
of a device directly to the optical input.
loopback test
Test that checks attachment or control unit circuitry, without checking the mechanism itself, by
returning the output of the mechanism as input.
LUN
See logical unit number.
MAC address
See Media Access Control address.
maintenance port
Connector on the Director operator panel where a PC running an ASCII terminal emulator can
be attached or dial-up connection made for specialized maintenance support.
managed product
Hardware product that can be managed with the Product Manager. For example, the HP
StorageWorks Director 2/64 is a managed product. See also device.
ha-fabric manager user guide
Glossary
Glossary–9