db
Parameters
value
Name of DB subnet group. DB instance will be created in the VPC associated with the DB subnet group. If unspecified, will be created in the default Subnet Group. When working with read replicas created in the same region, defaults to the Subnet Group Name of the source DB. When working with read replicas created in a different region, defaults to the default Subnet Group. See DBSubnetGroupName in API action CreateDBInstanceReadReplica for additional read replica constraints.