RDS Subnet Association

Question

Hi

If an oracle RDS was created using some VPC which has 8 subnets without selecting a subnet group, is there  a way to find out which exact subnet name AWS has selected to place it in?

ALso, is there a way to move the RDS from one subnet to another subnet after it was created or not?

Accepted Answer

Check the endpoint of the DB instance with the "nslookup" command to see the private IP address.  
It can also be determined from its IP address.  
RDS creates a network interface.  
By checking EC2→Network Interface, you can see that the RDS network interface has been created, and you can also identify the subnet from there.

The following documents may be helpful in moving subnets.  
https://repost.aws/knowledge-center/rds-move-to-private-subnet

RDS Subnet Association

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