SAP Note 434918 - Configuration for fully qualified host names for BSP

Symptom

A BSP is started that contains a shortened URL (no domain name) is started from SE80. This problem can be solved with the new profile parameter icm/host_name_full.

Other Terms

DNS
Domains
Domain
FQHN: full qualified host name

Reason and Prerequisites

If the host name only specifies the host and port but not the domain (including the extension), the shortened URL of a BSP application appears as follows:
<protocol>://<hostname>:<port>/sap/...
Example: http://pwdf0487:1080/sap/bc/bsp/sap/it00/default.htm

In contrast, the full URL should be as follows:
<protocol>://<host name>.<domain> <extension>:<port>/sap/...
Example: http://pwdf0487.wdf.sap-ag.de:1080/sap/bc/bsp/sap/it00/default.htm

When you display the page (that is, the BSP) in the browser, an error message is issued because the domain is not specified.
You can determine whether the specifications of the domain are missing by branching to one of your BSP applications in the SAP System: Call the development environment in the SAP System (transaction SE80).
Select BSP Application in the pull-down menu in the left column and enter the name of your BSP application in the field underneath. Select Display (the glasses symbol).
Double-click on a BSP under Pages.
Select the Attributes tab.
Check whether the path specification in the URL field next to the host also contains the domain, as described under Cause and Prerequisites.
If the domain specifications are missing, proceed as described in the Solution section and use the icm/host_name_full profile parameter.

Solution

You require the latest kernel patch (ICM patch collection (VIII) and patch level 510 or higher) as well as the icm/host_name_full parameter. You can use this parameter to specify the fully qualified host name of the host on which the ICM is running and which can be accessed for requests, for example, ls3022.wdf.sap-ag.de rather than ls3022.
If several application servers are operated with one instance profile, you could consider the following procedure: Set the value icm/host_name_full = $(SAPLOCALHOST).domain.ext.