Configuring Passthrough Services

Configuring DLUR

 

 

Configuring DLUR

 

 

Normally, a dependent LU session requires a direct communications link

 

 

to the host computer. If many nodes (including a host node) are

 

 

connected together in an APPN network, some of them may have an

 

 

indirect connection through another node instead of a direct connection

 

 

to the host. Without a direct connection, it is not possible to establish

 

 

dependent LU sessions to the host from LUs in these indirectly

 

 

connected nodes.

 

 

Dependent LU requester (DLUR) is an APPN feature designed to

 

 

overcome this limitation. DLUR can be configured on an APPN node

 

 

(such as a node running SNAplus2). It works in conjunction with

 

 

dependent LU server (DLUS) at the host, to route sessions from

 

 

dependent LUs on the DLUR node across the APPN network to the

 

 

DLUS host.

 

 

The route to the host can span multiple nodes and can take advantage of

 

 

APPN's network management, dynamic resource location, and route

 

 

calculation facilities. DLUR must be available on the node where the

 

 

LUs are defined, and DLUS must be available on the host node, but you

 

 

do not have to enable DLUR on any intermediate nodes in the session

 

 

route.

 

 

You cannot configure DLUR on a LEN node.

NOTE

 

 

 

To configure DLUR support on the local node, you must perform the

 

 

 

 

following configuration tasks:

 

Step 1. Define the local node as described in “Configuring the Node”.

 

Step 2. Configure connectivity to the APPN network. APPN connectivity

 

 

requires at least a port and link station for independent traffic between

 

 

the local node and the adjacent APPN network node, as described in

 

 

Chapter 5, “Defining Connectivity Components.”

 

Step 3. Define a DLUR PU on the local node as described in “Defining DLUR

 

 

PUs”. (The DLUR PU supports connectivity to the host.)

 

Step 4. To configure DLUR to support LUs on the local node, you must add the

 

 

LUs on the local node, as described in Chapter 8, “Configuring User

 

 

Applications.”. The LUs can be configured to support 3270 display, 3270

Chapter 9

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