Glossary
initial program load
IPL. The process of initializing the device and causing the operating system to start. An IPL may be initiated through a menu option or a hardware button.
initial program load configuration
IPL configuration. In S/390 mode, information stored in a director or switch’s nonvolatile memory that contains default configurations. The director or switch loads the file for operation when powered on.
Institute of Electrical and Electronics Engineers
IEEE. An organization of engineers and technical professionals that promotes the development and application of electronic technology and allied sciences.
integrated product
Hardware product that is mounted in the Fabricenter cabinet. For example, any director or switch shipped with in the Fabricenter cabinet is an integrated product.
interface
(1)A shared boundary between two functional units, defined by functional, signal, or other characteristics. The concept includes the specification of the connection of two devices having different functions (T). (2) Hardware, software, or both, that link systems, programs, or devices (D).
Internet protocol
IP. Network layer for the transmission control protocol/Internet protocol (TCP/IP) protocol used on Ethernet networks. IP provides packet routing, fragmentation, and reassembly through the data link layer (D).
Internet protocol address
IP address. Unique string of numbers (in the format xxx.xxx.xxx.xxx) that identifies a device on a network.
interoperability
Ability to communicate, execute programs, or transfer data between various functional units over a network.
interoperability mode
Interop mode. An operating mode set through management software that allows products to operate in homogeneous or heterogeneous fabrics.
interop mode
interrupt
A signal sent by a subsystem to the central processing unit (CPU) that signifies a process has either completed or could not be completed.