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Exchange DAG networks

Posted on 2016-08-09
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Last Modified: 2016-08-28
Exchange DAG networks

Any Exchange Expert to explain why there 2 Networks for Exchange DAG?
MAPI/Public network and Replication network.

What each of the Network serves for ?


Thank you.
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Question by:jskfan
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MAPI network
The MAPI network should be connected to the production network, So that it communicates with clients, other Exchange servers, AD, DNS etc.
Change the network binding order as in the screenshot below. This is to avoid delay in communication.
Network binding screenshot
Replication network
This basically used for replication. It is isolated from production network to reduce network congestion. Some use Vlan some use separate switch.  Normally others leave the subnet mask as default. I prefer subnet mask as 255.255.255.248 to avoid name resolution issue.
Normally it does not need gateway and DNS registration screenshot below.
 DNS
Below is a logical diagram of both networks
DAG
Here is an article explaining the same.
https://theucguy.net/network-adapter-configurations-for-dag/
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I believe my comment has sufficient information to solve this thread.
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