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Preinstallation Tasks

This topic describes important information that you need to review before installing BEA eLink Adapter for R/3 ALE. It includes the following main sections:

- System Requirements

- Determining the Installation Node

- TUXEDO Requirements

System Requirements

This document is validated for the following versions of the layered products:

####

Table 3-1 Supported Platforms

#### Product | #### Version(s)
--- | ---
SAP R/3 | 3.1H
TUXEDO | 6.5
HP-UX | 10.20, 11.00
Solaris | 2.6, 2.7
AIX | 4.3
Windows NT | 4.0 (Service Pack 4)

Determining the Installation Node

Where you install eLink Adapter for R/3 ALE depends on the node configuration:

- Single Node. If the R/3 environment is a single node configuration, then you should install BEA eLink Adapter for R/3 ALE on that node.

- Multiple Nodes. If the R/3 environment is a multiple node configuration, then you should install BEA eLink Adapter for R/3 ALE on one or more of the application servers. BEA eLink Adapter for R/3 ALE must not be installed on the database server.

BEA eLink Adapter for R/3 ALE interacts with R/3 using the SAP RFC library. The RFC library uses IP sockets to communicate with the R/3 application servers. Installing BEA eLink Adapter for R/3 ALE on an R/3 application server node minimizes the risk of failure in this IP socket connection. If BEA eLink Adapter for R/3 ALE is installed on an R/3 application server node, it is recommended that no other TUXEDO applications run on that same node, in order to reduce the workload on the node.

However, BEA eLink Adapter for R/3 ALE can be installed on a node other than an R/3 application server. In this situation, the IP socket connection will transparently extend across the network to the R/3 application server.

TUXEDO Requirements

BEA eLink Adapter for R/3 ALE requires that you properly install and configure TUXEDO:

- Installation Node. TUXEDO must be installed on the node running BEA eLink Adapter for R/3 ALE. For installation instructions, see the BEA TUXEDO Administrator's Guide for your platform.

- TUXEDO Configuration. After you install BEA eLink Adapter for R/3 ALE, you must configure TUXEDO according to the instructions described in TUXEDO Initialization File. BEA eLink Adapter for R/3 ALE provides a semi-configured TUXEDO initialization file, which requires only minimal configuration for the TUXEDO environment.

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