Nl_port, Nx_port – HP Brocade 4Gb SAN Switch for HP BladeSystem p-Class User Manual
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256 Glossary
Name Server
Simple Name Server (SNS). A switch service that stores names, addresses, and attributes for up to 15 minutes and
provides them as required to other devices in the fabric. SNS is defined by Fibre Channel standards and exists at a
well-known address. Also called a directory service.
NL_Port
Node loop port. A node port that has arbitrated loop capabilities. Connects an equipment port to the fabric in a
loop configuration through an FL_Port. See also
,
node
A Fibre Channel device that contains an N_Port or NL_Port. See also
node count
The number of nodes attached to a fabric.
node name
The unique identifier for a node, communicated during login and port discovery.
NOS
Not operational. The NOS primitive sequence is transmitted to indicate that the FC_Port transmitting the NOS has
detected a link failure or is offline and waiting for the offline sequence (OLS) to be received.
NS
Name Server. The service provided by a fabric switch that stores names, addresses, and attributes related to Fibre
Channel objects. Can cache information for up to 15 minutes. Also known as the Simple Name Server or as a
.
Nx_Port
A node port that can operate as either an N_Port or NL_Port.
OLS
Primitive sequence offline.
ON
Offline notification. Refers to an ELS field that appears in
portlogdump
command output.
OPN
Open primitive signal. Applies only to arbitrated loops; sent by an L_Port that has won the arbitration process to
open communication with one or more ports on the loop.
ordered set
A transmission word that uses 8B/10B mapping and begins with the K28.5 character. Ordered sets occur outside
of frames and include the following items:
•
Frame delimiters, which mark frame boundaries and describe frame contents.
•
Primitive signals, which indicate events.
•
Primitive sequences, which indicate or initiate port states.
Ordered sets differentiate Fibre Channel control information from data frames and manage frame transport.