e 6.1.
See logical unit 6.2.
LU 6.2 conversation level security
In SNA, a conversation level security protocol that enables a partner transaction program to authenticate the transaction program that initiated the conversation. See also end-user verification.
- A session that is initiated by VTAM on behalf of a logical unit (LU) 6.2 application program, or a session initiated by a remote LU in which the application program specifies that VTAM is to control the session by using the APPCCMD macroinstruction.
- In SNA, a session between two logical units (LUs) of type 6.2.
LU 6.2 verb
A syntactical unit in the LU 6.2 application programming interface that represents an operation. See also verb.
See least upper bound.
A VTAM major node type that consists of a list of model LU definitions. See also model LU.
LU-LU session type
See LU type.
LU-LU session type 0
In SNA, a type of session between two LU half-sessions using SNA-defined protocols for transmission control and data flow control, but using end-user or product-defined protocols to supplement or replace function management data services protocols. The system uses the SNA upline facility support.
LU-LU session type 1
In SNA, a type of session between an application program and single- or multiple-device data processing display stations in an interactive, batch data transfer, or distributed processing environment. The system uses the SNA remote job entry (RJE) support.
LU-LU session type 2
In SNA, a type of session between an application program and a single display station in an interactive environment, using the SNA 3270 data stream. The System i product uses the 3270 display emulation support.
LU-LU session type 4
In SNA, a type of session between (a) an application program and a single-device or multiple-device data processing or word processing display station in an interactive, batch data transfer, or distributed processing environment; or (b) logical units in peripheral nodes. The system uses the 5250 printer support.
In the VTAM implementation of the LU 6.2 architecture, the coupling of an LU name entry and a mode name entry. This coupling allows a pool of sessions with the same characteristics to be established.
See logical unit number.
The name by which VTAM refers to a node in a network. See also location name.
See logical unit number map.
- A process where a host object can detect more LUNs than it is intended to use, and the device-driver software masks the LUNs that are not to be used by this host.
- A process that allows or prevents I/O to the disk drives through the host-bus-adapter (HBA) device or operating-system device driver.
The classification of a logical unit in terms of the specific subset of SNA protocols and options that it supports for a given session. LU type specifies the values allowed in the session activation request, the usage of data stream controls, function management headers, request unit parameters, sense data values, and presentation services protocols.
LU type 0 (LU0)
Type of logical unit used for communicating with non-SNA terminals, using binary synchronous communication (BSC). LU0 enables the transmission of non-SNA protocols across an SNA network, and is heavily used for connecting non-SNA terminals. LU0 is more primitive than LU6.
LU type 1
An SNA logical unit type that provides a communication protocol among host application programs and terminals. Some printers also use this protocol to communicate with host application programs.
LU type 2
See Logical Unit type 2.
LU type 6 (LU 6)
Type of logical unit, used for processor-to-processor communication. LUTYPE6 defines a number of processes (applications - the file model, the queue model, the DL/I model, and so on) which are used in CICS intersystem communication (ISC). LUTYPE6 also supports user application to user application communication. There is no BMS support for this LU Type.
LU type 6.1 (LU 6.1)
Type of logical unit used for processor-to-processor sessions. LU type 6.1 is a development of LU type 6. CICS - DL/I, IMS, or SQL/DS intercommunication uses LU type 6.1 sessions.