**To create a DB subnet group** The following ``create-db-subnet-group`` example creates a DB subnet group called ``mysubnetgroup`` using existing subnets. :: aws rds create-db-subnet-group \ --db-subnet-group-name mysubnetgroup \ --db-subnet-group-description "test DB subnet group" \ --subnet-ids '["subnet-0a1dc4e1a6f123456","subnet-070dd7ecb3aaaaaaa","subnet-00f5b198bc0abcdef"]' Output:: { "DBSubnetGroup": { "DBSubnetGroupName": "mysubnetgroup", "DBSubnetGroupDescription": "test DB subnet group", "VpcId": "vpc-0f08e7610a1b2c3d4", "SubnetGroupStatus": "Complete", "Subnets": [ { "SubnetIdentifier": "subnet-070dd7ecb3aaaaaaa", "SubnetAvailabilityZone": { "Name": "us-west-2b" }, "SubnetStatus": "Active" }, { "SubnetIdentifier": "subnet-00f5b198bc0abcdef", "SubnetAvailabilityZone": { "Name": "us-west-2d" }, "SubnetStatus": "Active" }, { "SubnetIdentifier": "subnet-0a1dc4e1a6f123456", "SubnetAvailabilityZone": { "Name": "us-west-2b" }, "SubnetStatus": "Active" } ], "DBSubnetGroupArn": "arn:aws:rds:us-west-2:0123456789012:subgrp:mysubnetgroup" } } For more information, see `Creating a DB Instance in a VPC <https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_VPC.WorkingWithRDSInstanceinaVPC.html#USER_VPC.InstanceInVPC>`__ in the *Amazon RDS User Guide*.