Hot DR Site Replication with SRM

Hi Gurus,

I am in the process of designing SRM solution to a customer.

The customer needs to replicate some vm's from Primary Site to DR Site.

Some other vm's from DR Site to Primary Site.

In my opininon we can do this with 2 SRM packs for either site.

I need your advise as to how will the vCenter identify the Protected Site and Recovery Site at the same time.