Unit 4. Site-to-Site Connectivity Scenario

First, open the console and Services Site Links and see how long this set up for replication.
Then create an object in AD and expect to replicate.

Compare this with the time set in "Site and Services", and is equal to or less this ok (ok with the settings that were set)

If you are the highest: Run the command repadmin / showreps and put the result here.

Open the Event Viewer logs and see what errors appear.

When you create a site object in Active Directory, you associate one or more Internet Protocol (IP) subnets with the site. Each domain controller in a forest is associated with an Active Directory site. A client workstation is associated with a site according to its IP address; that is, each IP address maps to one subnet, which in turn maps to one site.
Active Directory uses sites to: * Optimize replication for speed and bandwidth consumption between domain controllers. * * Locate the closest domain controller for client logon, services, and directory searches. * * Direct a Distributed File System (DFS) client to the server that is hosting the requested data within the site. * * Replicate the system volume (SYSVOL), a collection of folders in the file system that exists on each domain controller in a domain and is required for implementation of Group Policy. *

The ideal environment for replication topology generation is a forest that has a forest functional level of at least Windows Server 2003. In this case, replication topology generation is faster and can accommodate more sites and domains than occurs when the forest has a forest functional level of Windows 2000. When at least one domain controller in each site is running Windows Server 2003, more domain controllers in each site can be used to replicate changes between sites than when all domain controllers are running Windows 2000 Server.
In addition, replication topology generation requires the following conditions:

* A Domain Name System (DNS) infrastructure that manages the name resolution for domain controllers in the forest. Active Directory–integrated DNS is assumed, wherein DNS zone data is stored in Active Directory and is replicated to all domain controllers that are DNS servers. * * All physical locations that are represented as site objects in Active Directory have LAN connectivity. * * IP connectivity is available between each site and all sites in the same forest that host operations master roles. * * Domain controllers meet the hardware requirements for Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Standard Edition; Windows Server 2003, Enterprise Edition; and Windows Server 2003, Datacenter Edition. * * The appropriate number of domain controllers is deployed for each domain that is represented in each site.

This section covers the replication components that create the replication topology and how they work together, plus the mechanisms and rationale for routing replication traffic between domain controllers in the same site and in different sites.