This course will introduce you to the functions of sites and subnets in AD, the association between sites and subnets, and the related setup steps. Application background: Contoso headquarters in Xian (Xian), southern Shaanxi Hanzhong (Shannan) and northern Shaanxi Yulin (SHANBEI) respectively with branch offices, respectively, responsible for the southern Shaanxi and northern Shaanxi business. The total number of employees in Contoso is 150 because the entire company has a few resource objects, so a single domain structure is used to manage IT infrastructure throughout the company. The company's employees in three locations (Xian, south Shaanxi and northern Shaanxi), in order to facilitate the three employees to access the resources of the ad, so the Xian, Shannan, Shanbei three sites were created. And in three sites deployed three DC:DC1 responsible for Xi ' an user to do query ad action, DC2 responsible for southern Shaanxi, DC3 responsible for northern Shaanxi (at least one DC in each site). and three sites are connected through the DDN line. Open Active Directory sites and services on DC1 to see sites in three locations in Xian, south Shaanxi, and northern Shaanxi. Two things can be seen in this: on the one hand: there is a DC in each site. Each DC can determine, according to the structure in Active Directory sites and services, which site to work for (providing query services to the users of the owning site). On the other hand: in subnets (subnet) There are three subnets, respectively, 192.168.66.0/24, 192.168.88.0/24, 192.168.99.0/24. The three subnets are used by the three-site member machines to identify which site they belong to, and which DC to connect to for querying. The above setup will solve the problem of it architecture management in Contoso. So how exactly do you set it up? What is the concept of a site? What's the use of doing this? Let's set it up one step at a pace. Operation steps: 1. Upgrade three servers to DC2, open Active Directory sites and services, and create three sites named "Xian" "Shannan" "Shanbei" respectively. 3, respectively, the DC1, DC2, DC3 from the default site to move to the "Xian" "Shannan" "Shanbei" three sites. 4. Create three subnets in subnets (subnet) 192.168.0.66.0/24 (Shannan), 192.168.88.0/24 (Shanbei), 192.168.99.0/ (Xian) (select the site to which the subnet belongs when creating subnets). Summary: The configuration of the site and subnet can be realized through the above steps. Let's summarize the concept and function of the site.
the concept of a site: A group of computers connected together at high speed (typically composed of one or more high-speed IP subnets), is a concept that is physically abstracted (so that he contains both physical and logical meanings).
the role of the site: Optimize replication, solve the problem of slow connection in enterprise AD architecture, so that users can reliably and highly connect to DC to do AD verification query action.
Description of the role : if there is no site, South Shaanxi users log in to the domain, to go to Xi ' an DC to do query verification action, and the south of the user may be a relatively low-speed network connection to Xi ' an DC1, so whether it environment users or IT environment managers, Such a structure is a burden. Then need to have a solution, the AD site formally resolved this physical connection speed too slow (slow connection) problem: the physical connection between the site is not fast, so the site users need to do queries in the ad when it is only necessary to connect to the site of the DC to do the query action is OK. Such a structure solves the physical connectivity problem of the ad environment with a slow-connected network. (This is also the genius of Microsoft AD, with the logic of the East (software), low-cost high-return solution to the problem of physical connection. )
relationship between a site and a domain: There can be multiple sites in a domain, and multiple domains can be in one site.
