We have recently updated the Configuration Manager Documentation Library regarding site boundary configurations.  This change was made to clarify the use of supernets, which remain unsupported but have been a source of confusion resulting in support calls.   The confusion comes when an Active Directory site is configured as a boundary and that Active Directory site contains one or more supernets. 

Configuration Manager does not support supernets for site boundaries.  This includes supernets defined directly in the Configuration Manager console as IP subnets, and supernets defined indirectly in the Configuration Manager console as Active Directory sites that contain supernets. Supernets can result in inconsistent behavior for Configuation Manager actions that use boundary configurations, such as site discovery and auto-site assignment for clients, and content location for when clients find distribution points to download packages.

Two common problems you might see when using supernets include the following:

  • Clients are unable to discover and to automatically assign to the correct site.
  • Clients fail to download packages because they are not given the expected distribution points .

It's easy to miss that supernets might be the underlying cause of these problems because of inconsistent behavior.  Some clients that use supernets can behave as expected, while others do not.   Configuration Manager 2007 was not designed to support supernets as boundaries, [Read More...]