High Availability 
The following prerequisites apply if you want to run SAP NetWeaver usage type PI in a high availability environment.
SAP Web Dispatcher enables HTTP load balancing between SAP NetWeaver AS instances.
In an HA environment, we recommend that you install the SAP Web Dispatcher as an additional component into an existing SAP cluster group or package.
The SAP system setup tool SAPinst supports the installation of a standalone SAP Web Dispatcher instance. It is also possible, however, to run SAP Web Dispatcher as a standalone program or service.
More information about SAP Web Dispatcher: Operating the SAP Web Dispatcher.
Configuration changes to the following components:
The following parameters are used to describe the required configuration steps.
Parameter description:
Parameter |
Description |
|---|---|
<virtual host> |
SAP Web Dispatcher host name |
<httpport> |
SAP Web Dispatcher HTTP port |
<httpsport> |
SAP Web Dispatcher HTTPS port |
<ms virtual host> |
(A)SCS Message Server host name |
<is sld name> |
Integration Server name in the SLD. Default value: is.<cisysnr>.<cihost> |
<SID> |
SAP system ID |
SPACE |
Default RFC logon group SPACE |