Attaching peripheral nodes to VTAM using NTRI

NCP/Token-Ring Interconnection (NTRI) is an NCP function that allows a communication controller to attach to the IBM® Token-Ring LAN and that provides both subarea and peripheral node DLC services in the SNA network. This section describes the peripheral node DLC services that NTRI provides to VTAM®.

You implement this type of connection by defining both of the following:

switched major node
NCP major node

The switched major node defines the peripheral nodes and associated logical units that are attached to the token ring.

The NCP major node defines both physical and logical resources:

The token-ring interface coupler (TIC) connection for NTRI support is defined as a physical connection in a GROUP definition statement specifying ECLTYPE=PHYSICAL.
The peripheral nodes that are attached to the token ring are defined as logical connections in a GROUP definition statement specifying ECLTYPE=LOGICAL.

The name specified for GRPNM (group name) in the PATH definition statement of the switched major node must match the name of the logical group definition in the NCP major node.

In the configuration illustrated in Figure 1, the communicating VTAMs A02N and A81N are defined as type 2.1 peripheral nodes to each other and are attached to the token-ring network through NCP A31 and NCP A04.

Figure 1. Peripheral node attachment to VTAM using NTRI

A diagram that shows VTAM A02N is attached to a token-ring network through NCP A31 and VTAM A81N is attached to the token-ring network through NCP A04.

The samples that follow are the logical line groups defined by the NCP major nodes for this configuration. For the sample switched major nodes used for this same configuration, see NCP/Token-Ring Interconnection (NTRI) for peripheral nodes.

***********************************************************************
* NTRI PERIPHERAL LOGICAL LINES - USED WITH A31TR89                   *
***********************************************************************
A04BNNG1 GROUP ANS=CONTINUE,           CONTINUE IF HOST LOST           *
         AUTOGEN=20,                   NUMBER OF DEVICES ON THE LAN    *
         CALL=INOUT,                   CONNECTION OPTIONS              *
         ECLTYPE=LOGICAL,                                              *
         ISTATUS=ACTIVE,                                               *
         MODETAB=AMODETAB,                                             *
         NPACOLL=(YES,EXTENDED),                                       *
         PHYPORT=2,                    ASSOCIATE WITH PHYSICAL PORT    *
         RETRIES=(10,10,10,10),                                        *
         SRT=(100,10,YES),                                             *
         USSTAB=AUSSTAB,                                               *
  .      XMITDLY=NONE
  .
  .
***********************************************************************
* NTRI PERIPHERAL LOGICAL LINES                                       *
*    USED WITH A31TR88, A31TR89, A31TR92, AND/OR A31TR93              *
***********************************************************************
A31BNNG1 GROUP ANS=CONTINUE,           CONTINUE IF HOST LOST           *
         AUTOGEN=20,                   NUMBER OF DEVICES ON THE LAN    *
         CALL=INOUT,                   CONNECTION OPTIONS              *
         ECLTYPE=LOGICAL,                                              *
         ISTATUS=ACTIVE,                                               *
         MODETAB=AMODETAB,                                             *
         NPACOLL=(YES,EXTENDED),                                       *
         PHYPORT=NONE,                 ASSOCIATE WITH PHYSICAL PORT    *
         RETRIES=(10,10,10,10),                                        *
         USSTAB=AUSSTAB,                                               *
         XMITDLY=NONE