HP Surestore 64 FW 05.01.00 and SW 07.01.00 HP StorageWorks Directors and Edge - Page 20

Glossary online state When the switch or director is in the online state, all of the unblocked ports are allowed to log in to the fabric and begin communicating. Devices can connect to the switch or director if the port is not blocked and can communicate with another attached device if both devices are in the same zone, or if the default zone is enabled. See also offline state. Open Systems Management Server An optional feature that can be enabled on the director or switch through the Product Manager application. When enabled, host control and management of the director or switch are provided through an open systems interconnection (OSI) device attached to a director or switch port. Open Trunking Open Trunking is a licensed optional feature that enables load balancing of traffic flows. Open Trunking monitors the average speed of data traffic through a flow. In the event of traffic congestion, or if traffic on an ISL is disproportionate, a traffic flow is rerouted to a less congested ISL. See also interswitch link. Operating System/390 (OS/390) - An integrated, open-enterprise server operating system developed by IBM that incorporates a leading-edge and open communications server, distributed data and file services, parallel Sysplex support, object-oriented programming, distributed computing environment, and open application interfaces. optical cable Fiber, multiple fibers, or a fiber bundle in a structure built to meet optical, mechanical, and environmental specifications. See also jumper cable, optical cable assembly, and trunk cable. optical cable assembly Optical cable that is connector-terminated. See also jumper cable and optical cable. optical fiber connector Hardware component that transfers optical power between two optical fibers or bundles and is designed to be repeatedly connected and disconnected. out-of-band management Transmission of management information using frequencies or channels (Ethernet) other than those routinely used for information transfer (Fibre Channel). See also inband management packet Logical unit of information (usually in the form of a data frame) transmitted on a network. It contains a header (with all relevant addressing and timing information), the actual data, and a trailer (which contains the error checking function, usually in the form of a cyclic redundancy check). 20 Directors and Edge Switches Glossary