This chapter deals briefly with the technical background of the SUM UI.

To display the SUM UI correctly, it is necessary that Software Update Manager is known to the SAP Host Agent so that both can communicate with each other. For more information. see Registering SUM in SAP Host Agent.

You start the SUM user interface (UI) by entering the URL, which is relevant for your platform technology, in the address bar of a browser. This action connects the browser with the Software Update Manager by means of the SAP Host Agent. You can connect from a client machine, or from the same host. By default, the SUM UI uses the standard protocol HTTPS (for a secure connection) and port 1129 of the SAP Host Agent. SUM then calls internally the relevant executables, which carry out the update steps.