Question
What are the different DNS Cluster roles?
Answer
There are three DNS Cluster roles, Standalone, Synchronize, and Write-Only. The role determines how the local server interacts with the remote server.
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Standalone
A server configured with the Standalone role will not push zone updates to the remote server.
A nameserver is generally configured with the Standalone role to establish a reverse trust relationship with a remote web server.
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Synchronize
A server configured with the Synchronize role will check the zone's serial number on the remote server against the serial number in the local zone. If the remote server's zone has a lower serial number than the local zone's serial number, the local server will push the zone changes to the remote server.
A nameserver is generally configured with the Synchronize role to ensure that the local server and a remote nameserver have the same data in their zones.
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Write-Only
A server configured with the Write-Only role will push zones changes to the remote server without checking serial numbers.
A web server is generally configured with the Write-Only role to push zone updates to a remote nameserver.
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