Glossary

call-home

Product feature which enables the HAFM server to automatically contact a support center and report system problems. The support center server accepts calls from the HAFM server, logs reported events, and can notify one or more support center representatives.

channel

Point-to-point link that transports data from one point to the other.

channel path

A single interface between a central processor and one or more control units along which signals and data can be sent to perform I/O requests.

channel path identifier

In a channel subsystem, a value assigned to each installed channel path of the system that uniquely identifies that path to the system.

channel wrap test

A diagnostic procedure that checks host-to-Director connectivity by returning the output of the host as input. The test is host-initiated, and transmits Fibre Channel frames to a director port. A director port enabled for channel wrapping echoes the frame back to the host.

class of Fibre Channel service

Defines the level of connection dedication, acknowledgment, and other characteristics of a connection.

Class F Fibre Channel service

Used by switches to communicate across interswitch links (ISLs) to configure, control, and coordinate a multi-switch fabric.

Class 2 Fibre Channel service

Provides a connectionless (not dedicated) service with notification of delivery or nondelivery between two N_Ports. In-order delivery of frames is not guaranteed.

Class 3 Fibre Channel service

Provides a connectionless (not dedicated) service without notification of delivery or nondelivery between two N_Ports. Also known as datagram.

community profile

Information that specifies which management objects are available to what management domain or SNMP community name.

concurrent maintenance

Ability to perform maintenance tasks, such as removal or replacement of field-replaceable units, while a hardware product is operating.