apps/scalablegateway/network-cfg.json

{
    "apps" : {
        "org.onosproject.scalablegateway" : {
            "scalablegateway" : {
              "nodes" : [
              {
                "bridgeId" : "of:0000000000000003",
                "dataPlaneIp" : "10.62.148.17",
                "gatewayExternalInterfaceName" : "veth0"
                }]
            }
        }
    }
}