Determining costs for Active Directory site links

This content is 20 years old. I don't routinely update old blog posts as they are only intended to represent a view at a particular point in time. Please be warned that the information here may be out of date.

Whilst reviewing a colleague’s Active Directory design document today, I came across the following model for determining the cost of a site link, depending on the available bandwidth:

Replication cost = 1024 x 1/logbandwidth (in Kbps)

The following table gives some example costs for common bandwidth values:

Bandwidth (Kbps) Replication cost
28 702
56 586
64 567
96 517
128 486
256 425
512 378
1024 340
2048 309
4096 283

One thought on “Determining costs for Active Directory site links

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.