HP StorageWorks 2/140 director product manager user guide - Page 212

Glossary channel wrap test A diagnostic procedure that checks S/390 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, Class 2, and Class 3 services are supported. Class F Fibre Channel service Used by switches to communicate across interswitch links (ISLs) to configure, control, and coordinate a multiswitch 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 (FRUs), while normal operations continue without interruption. See also nondisruptive maintenance. configuration data Configuration data includes: identification data, port configuration data, operating parameters, SNMP configuration, and zoning configuration. A configuration backup file is required to restore configuration data if the control processor (CTP) card in a nonredundant director is removed and replaced. connectionless Nondedicated link. Typically used to describe a link between nodes which allows the switch to forward Class 2 or Class 3 frames as resources (ports) allow. connector See optical fiber connector. Glossary-4 director product manager user guide