Muhammad Abid Lv3Posted 2026-Aug-25 19:31
  
The key point is: you should not normally select one physical node’s IP as the replication IP when the Primary site has two nodes.

For your topology:

Primary Site: Node 1 + Node 2
DR Site: Node 3
Replication IP: 1 IP at Primary + 1 IP at DR

The preferred design is to use a virtual/cluster IP (VIP) at the Primary site for replication. That VIP should be able to move between Node 1 and Node 2 if one node fails.

So the communication would look like:

Primary Cluster VIP → DR Node IP

If your replication product specifically requires a replication IP configured on each node, then you would need:

Node 1 → Replication IP 1
Node 2 → Replication IP 2
DR Node → Replication IP

With only one Primary-site IP, the correct approach depends on whether your replication software supports a cluster/virtual replication IP.

If you tell me the exact product/technology you're using for replication, I can give you the exact configuration for your 2-node Primary → 1-node DR setup.

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