Internet Information Services (IIS) 6 Resource Kit

Configure the Web Site Identification Number

When a new site is created on Internet Information Services (IIS) 6.0, a Web site identification number is randomly generated based on the name of the Web site. In this way, Web sites of the same name usually generate the same Web site identification for IIS 6.0 servers in a Web farm. With IIS 5.0 and earlier versions, Web site identification numbers were incremental. For example, because the default Web site is created first, its site identification number is 1, and the next site to be created is identified as 2.

If you have administrative scripts that depend upon the IIS 5.0 method of generating Web site identification numbers, you can edit the registry entry IncrementalSiteIDCreation in the Windows ...