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Configuring APPC Communication
Defining Local LUs
Defining Local LUs
In many cases, applications can use the local node's control point LU,
which is automatically defined when you configure the node. This is the
default LU—if your application does not specify a particular LU, it can
use this one. If the application uses the default LU, you do not need to
define a local LU. Check the documentation for your APPC application,
or contact the application programmer.
If you are configuring dependent LUs of type 6.2 for use with APPC or
CPI-C applications, you may wish to define them as members of the
default pool. An application that does not specify a particular local LU is
assigned an unused LU from the pool of LUs defined as default LUs.
You can define dependent LU 6.2s as default LUs (and you can define
default LUs on more than node). An application requesting a default LU
can be assigned to any of these LUs as available; the LU does not have to
be on the same computer as the application. However, if you are defining
partner LUs for the applications, the partner LUs must be defined on all
nodes where default LUs are defined, so that the application can contact
the correct partner LU using any of the default local LUs defined on any
node.
Independent APPC and 5250 use 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 SNAplus2 node is an end 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. (If
the partner LU is the default LU on the remote node, you do not need to
define it explicitly because it is added automatically when you define the
remote node.)
To configure an APPC local LU, use one of the following methods:
Motif administration program
Select APPC and either New independent local LU
or New dependent local LU from the Services
menu on the Node window.
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Chapter 7
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