Just have a look into SCCM 2012 and here is the summary of the new hierarchy model that should assist during design of SCCM 2012 deployment
Complex hierarchy model:-
- Central Administration Model
- Must install first
- Manage multiple primary site.
- No client connectivity
- Primary Site
- Can be standalone and each primary site can handle 100K client.
- Primary site cannot be a child of another primary site
- To directly manage clients
- Secondary Site
- Suitable to deploy across low bandwidth network
- Up to 2500 client
- Distribution Point
- Suitable to deploy across low bandwidth network
- Up to 500 client
