I'm setting up a 2-node AlwaysOn Availability Group (SQL Server 2017 Enterprise) with the following setup:
- Existing DC+DNS (One NIC: 10.20.11.1/255.255.254.0)
- New AG-Node1 (One NIC: 10.20.11.2/255.255.254.0)
- New AG-Node2 (One NIC: 10.22.11.1/255.255.254.0)
I've read that this would be considered as an "AlwaysOn Multi-subnet" scenario (since nodes belong to different subnets).
Do I really have to treat this as an "AlwaysOn AG Multi subnet" even when all required routing is already implemented at networking device level and computers can all reach each other?
I've read that Routing and Remote Access is supposed to be deployed and configured but I do not get why this would be necessary since the routing is already implemented at networking device level.