{
    "AWSTemplateFormatVersion": "2010-09-09",

    "Resources": {
        "$interfaceName": {
            "Type": "OS::Neutron::RouterInterface",
            "Properties": {
                "router_id": "$routerId",
                "subnet_id": {
                    "Ref": "$subnet"
                }
            }
        }
    },

    "Outputs": {
    }
}