**To create a network interface permission** This example grants permission to account ``123456789012`` to attach network interface ``eni-1a2b3c4d`` to an instance. Command:: aws ec2 create-network-interface-permission --network-interface-id eni-1a2b3c4d --aws-account-id 123456789012 --permission INSTANCE-ATTACH Output:: { "InterfacePermission": { "PermissionState": { "State": "GRANTED" }, "NetworkInterfacePermissionId": "eni-perm-06fd19020ede149ea", "NetworkInterfaceId": "eni-1a2b3c4d", "Permission": "INSTANCE-ATTACH", "AwsAccountId": "123456789012" } }