LU6.2
Encyclopedia
Logical Unit 6.2 is an IBM
-originated communications protocol specification dating from 1974, and is part of IBM's Systems Network Architecture.
A device-independent SNA
protocol, it is used for peer-to-peer communications
between two systems, for example, between a computer and a device (e.g. terminal or printer), or between computers. LU6.2 is used by many of IBM's products, including Common Programming Interface for Communications
Intersystem Communications (CICS ISC), and Information Management System.
Some examples of a non-IBM product which implemented the SNA stack including LU6.2 are: Microsoft's Host Integration Server, and Netware for SAA
.
APPC is the protocol used with LU6.2 architecture.
LU6.2-compliant devices operate as peers within the network and can perform multiple simultaneous transactions over the network. LU6.2 devices can also detect and correct errors. The LU6.2 definition provides a common API for communicating with and controlling compliant devices. Although the concepts were the same on all platforms, the actual API implementation often varied on each IBM platform which implemented it. Other vendors also implemented LU6.2 in their own products and with their own APIs. IBM later defined the "Common Programming Interface - Communications" (CPIC) API which would eventually become widely implemented. CPIC allowed for the authoring of multi-platform code. APPC is often used to refer to the LU6.2 architecture or to specific LU6.2 features.
Contrast to LU0, LU2 and LU3 of the IBM Systems Network Architecture.
IBM
International Business Machines Corporation or IBM is an American multinational technology and consulting corporation headquartered in Armonk, New York, United States. IBM manufactures and sells computer hardware and software, and it offers infrastructure, hosting and consulting services in areas...
-originated communications protocol specification dating from 1974, and is part of IBM's Systems Network Architecture.
A device-independent SNA
Systems Network Architecture
Systems Network Architecture is IBM's proprietary networking architecture created in 1974. It is a complete protocol stack for interconnecting computers and their resources. SNA describes the protocol and is, in itself, not actually a program...
protocol, it is used for peer-to-peer communications
Peer-to-peer
Peer-to-peer computing or networking is a distributed application architecture that partitions tasks or workloads among peers. Peers are equally privileged, equipotent participants in the application...
between two systems, for example, between a computer and a device (e.g. terminal or printer), or between computers. LU6.2 is used by many of IBM's products, including Common Programming Interface for Communications
Common Programming Interface for Communications
Common Programming Interface for Communications is an application programming interface developed by IBM in 1987 to provide a platform-independent communications interface for the IBM Systems Application Architecture based network, and standardising programming access to SNA LU 6.2.It was adopted...
Intersystem Communications (CICS ISC), and Information Management System.
Some examples of a non-IBM product which implemented the SNA stack including LU6.2 are: Microsoft's Host Integration Server, and Netware for SAA
Systems Application Architecture
Systems Application Architecture is a set of standards for computer software, developed by IBM in the 1980s and implemented in IBM operating systems including MVS, OS/400 and OS/2...
.
APPC is the protocol used with LU6.2 architecture.
LU6.2-compliant devices operate as peers within the network and can perform multiple simultaneous transactions over the network. LU6.2 devices can also detect and correct errors. The LU6.2 definition provides a common API for communicating with and controlling compliant devices. Although the concepts were the same on all platforms, the actual API implementation often varied on each IBM platform which implemented it. Other vendors also implemented LU6.2 in their own products and with their own APIs. IBM later defined the "Common Programming Interface - Communications" (CPIC) API which would eventually become widely implemented. CPIC allowed for the authoring of multi-platform code. APPC is often used to refer to the LU6.2 architecture or to specific LU6.2 features.
Contrast to LU0, LU2 and LU3 of the IBM Systems Network Architecture.