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AD sites and Network Speed

Microsoft says "Sites are Active Directory objects that represent one or more TCP/IP subnets with highly reliable and fast network connections." I am curious what is the generally accepted definition of "FAST"?

What is the slowest link between DC(sites) that is considered acceptable for an AD site boundary?

Moreover has anyone created an AD site that spans multiple physical locations or Azure with link speeds in the 30-40ms range?

windows-active-directorywindows-platform-network
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Hello anonymous user,
How are things going on your end? Please keep me posted on this issue.
If you have any further questions or concerns about this question, please let us know.
I appreciate your time and efforts.



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Daisy Zhou


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Hello anonymous user,
I just want to confirm the current situations.
Please feel free to let us know if you need further assistance.




Best Regards,
Daisy Zhou


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DickersonOliver-1601 answered DickersonOliver-1601 edited

Than you for your response. I believe rather than create a cross-location AD site, we're going to try the "instant replication" setting for the site link to Azure using ADSIEDIT.

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DaisyZhou-MSFT answered

Hello anonymous user,

Thank you for posting here.

Here are the answers for your reference.

Microsoft says "Sites are Active Directory objects that represent one or more TCP/IP subnets with highly reliable and fast network connections." I am curious what is the generally accepted definition of "FAST"?
A: Basically, it is a local area network, the network is reliable, the link speed is good, and it is not easy to be interrupted.

What is the slowest link between DC(sites) that is considered acceptable for an AD site boundary?
A: The slowest link is 500 (Kbps).

Group Policy Slow Link Detection using Windows Vista and later
https://techcommunity.microsoft.com/t5/ask-the-directory-services-team/group-policy-slow-link-detection-using-windows-vista-and-later/ba-p/397210

Moreover, has anyone created an AD site that spans multiple physical locations or Azure with link speeds in the 30-40ms range?
A: If you create such site, and link speeds in the 30-40ms range is your accepted range based on your own network speed, you can configure and keep such site.
If you create such site, and link speeds in the 30-40ms range is not your accepted range based on your own network speed, you may not need to configure and keep such site.

Hope the information above is helpful.

Should you have any question or concern, please feel free to let us know.


Best Regards,
Daisy Zhou


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