How does HP SIM works in Enterprise Data Center and multiple IP subnets ?

People,

I'm still trialling HP SIM here as the means to centralized hardware monitoring for all HP products (Printers, HP Procurve Switches and HP Proliant servers).

But I'm still struggling to control how it works.

Which one is HP SIM behaviour:

pull (polling) on a scheduled interval

or

received the forwarded WBEM event alert sent by the agents thus emailing me just once

If anyone can share how do you set up the HP Sim in your environment that’d be greatly appreciated.

Thanks.