HP-UX SNAplus2 R7 Administration Guide

Configuring Passthrough Services
Configuring DLUR
If you are defining a range of LUs, specify a base name of 1–5 characters. SNAplus2 adds a three-digit
decimal string to the base name to create an LU name for each LU number you specify.
Downstream PU name
The name of the link station to the downstream node.
LU number
The LU number must match the LU number defined on the downstream node. Contact your SNA network
planner if you do not know what LU number to use.
You can configure several LUs with consecutive LU numbers by defining a range of LUs.
Upstream LU name
The name of the host LU or a pool of LUs with which the downstream LUs will communicate.
Delayed logon
To reduce the user startup time, SNAplus2 displays a logon screen without assigning an upstream LU; a 3270
user must hit a key before the user is associated with an upstream LU.
Allow timeout
To reduce the number of LUs required, an LU without an active PLU-SLU session is disassociated from the
upstream LU after this number of seconds.
9.2.2 Additional Configuration
After performing the downstream LUs for PU concentration configuration, continue with the following configuration
tasks:
• To configure user applications, see Chapter 8, Configuring User Applications.
9.3 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.
Note
You cannot configure DLUR on a LEN node.
If the SNAplus2 DLUR node is a network node, it can also provide passthrough DLUR facilities for dependent LUs
on downstream computers connected to the SNAplus2 node. (Only network nodes support this function.) These
downstream LUs can use DLUR on the SNAplus2 node to access the host across the network, in the same way that
LUs internal to the node do.
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