Latency between domain controllers in the same AD Site

Joe Apple 1 Reputation point
2021-03-07T08:13:03.97+00:00

I'm planning to extend our AD to another datacenter and public clouds.

What is the maximum allowed latency in milliseconds from an AD perspective (replication, queries, etc.) between Domain Controllers that belong to the same AD site so that I can keep them using the same AD site, and I will avoid at least the 15 minutes replication interval between ad sites

Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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  1. Fan Fan 15,321 Reputation points Microsoft Vendor
    2021-03-08T04:27:15.933+00:00

    Hi,
    Replication within a site occurs automatically on the basis of change notification. Intra-site replication begins when you make a directory update on a domain controller. By default, the source domain controller waits 15 seconds and then sends an update notification to its closest replication partner. If the source domain controller has more than one replication partner, subsequent notifications go out by default at 3 second intervals to each partner. After receiving notification of a change, a partner domain controller sends a directory update request to the source domain controller. The source domain controller responds to the request with a replication operation. The 3 second notification interval prevents the source domain controller from being overwhelmed with simultaneous update requests from its replication partners.

    If you want to Modify the Default Intra-Site Domain Controller Replication Interval, you can refer to the following link:
    https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/modify-default-intra-site-dc-replication-interval

    Didn't find any information to clarify the max limit for the value.

    Best Regards,