Windows Server® 2012 Unleashed

Determining Site Links and Site Link Costs

As previously mentioned, site links should normally be designed to overlay the WAN link structure of an organization. If multiple WAN routes exist throughout an organization, it is wise to establish multiple site links to correspond with those routes.

Organizations with a meshed WAN topology need not establish site links for every connection, however. Logically consolidating the potential traffic routes into a series of pathways is a more effective approach and helps to make your environment easier to understand and troubleshoot.