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Exchange 2016

yasser Mohamed AbdelMoneim 291 Reputation points
2022-03-22T09:36:18.573+00:00

Hello

If we have Exchange 2016 with DAG in one datacenter and we have requested to extend the DAG to another location and that location has different subnet , what is the concern and consideration to be taken.

what is the steps to extend the dag and consider the new subnet in the second datacenter?

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

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Answer accepted by question author

Andy David - MVP 160.3K Reputation points MVP Volunteer Moderator
2022-03-22T12:22:11.38+00:00

Depends:
If you are using an IPLess DAG cluster and a single network as recommended, then all you need to do is add the Mailbox Servers to the existing DAG.

If however you are using an IP-enabled DAG cluster, you will need to add an unique IP on the new subnet to the cluster object and add to DNS

If you are using two NICS ) one for replication and one for MAPI, then you will need to account for that as well.

https://learn.microsoft.com/en-us/exchange/high-availability/manage-ha/manage-dags?view=exchserver-2019

https://learn.microsoft.com/en-us/exchange/high-availability/manage-ha/manage-dags?view=exchserver-2019#dag-networks-and-multiple-subnet-deployments

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