Configuring APPC communication

APPC applications and CPI-C applications require that you configure APPC first. An APPC application uses the node's LU type 6.2 resources to communicate with another APPC or CPI-C application on a host or peer computer, using a specified mode.

Before you can configure APPC communication, you must perform the following configuration:

  1. Configure the node as described in Configuring the node.
  2. Configure connectivity as described in Configuring connectivity.

The remaining configuration steps depend on whether the configuration supports dependent traffic, independent traffic, or both:

Independent APPC
Independent APPC uses independent LUs. Each LU-LU session involves a local LU and a partner LU.

For the local LU, you can use the predefined default LU associated with the node control point, or you can configure new local LUs.

The partner LU need not be configured at all if the CS/AIX node is an end node or network node in an APPN network, because APPN can locate partner LUs dynamically. However, you do have to configure the partner LU if your network is not an APPN network or if the node is a LEN node. In this case, you must configure the remote node where the partner LU resides, then define the partner LU on the remote node.

Dependent APPC
If the remote node is a host that does not support independent LU 6.2, configure for dependent traffic. For dependent APPC, you must configure a local LU.

If the applications use CPI-C, you may need to do additional CPI-C configuration after configuring APPC (see Configuring for CPI communications). A CPI-C application uses the node's LU type 6.2 and mode resources to communicate with another APPC or CPI-C application on a host or peer computer. You define the same resources for a CPI-C application as for an APPC application. In addition, if the TP on the CS/AIX computer is the invoking TP, also known as the source TP (the TP that starts the conversation), you may need to define one or more side information entries for it, as described in Configuring for CPI communications. Each of these entries provides information on a partner TP, the LU and mode resources used to access it, and any security information required.

This section explains how to configure a simple APPN network (using independent LU 6.2) that consists of a network node, an end node, and a LEN node, as described in Configuring a simple APPN network. (This scenario also shows how you can get status information for CP-CP sessions between two nodes.)

This section also explains how to configure dependent APPC communication, as described in Configuring dependent APPC.

Both of these scenarios assume that APPC sessions use a standard mode and class-of-service (COS).

For information about configuring additional APPC information, such as modes, security, and invokable (target) TPs, refer to IBM Communications Server for Data Center Deployment on AIX Administration Guide.