Hi Jansi,
I think which method you use is dependent on the installation scenario.
If the diagnostics agent was installed with a managed system installation then it would be using SLD registration option which also requires some additional tasks to setup agent in SOLMAN_SETUP for managed systems. If the agent was not registered with SLD then you can use the smdsetup script.
If the diagnostics agent is installed with standalone package then you can use direct install option to Solution Manager. This option as far as I understand does not require extra activities to be performed in SOLMAN_SETUP for the diag agent. You can still register the agent with SLD.
In order for Solution Manager to push new data(eg. after an upgrade) to the diagnostics agents they must be registered in SLD. At least that's how I understand it.
Hope that makes sense.
Regards,
Nelis
Message was edited by: Nelis Lamprecht - Corrected SLD reg with direct install option.