root@heimgard-9300:~# ubus call map.controller.dbg topology
{
        {
                "alid": "b2:dd:74:b2:93:00",
                "hostname": "heimgard-9300",
                "2g": "1/20",
                "5g": "100/80",
                "leafs": [
                        {
                                "alid": "5a:00:32:ee:a4:e0",
                                "hostname": "Pulse-EX600-580032eea4e0",
                                "media": "Ethernet (802_3AB_GIGABIT_ETHERNET)",
                                "5g": "104/80",
                                "2g": "6/20",
                                "leafs": [
                                        {
                                                "alid": "8a:46:f2:36:2b:02",
                                                "hostname": "bpi-r3-8a46f2362b02",
                                                "media": "Wi-Fi (802_11AC_5_GHZ)",
                                                "2g": "11/20",
                                                "5g": "104/80"
                                        },
                                        {
                                                "alid": "b2:dd:74:b2:c7:50",
                                                "hostname": "heimgard-C750",
                                                "media": "Wi-Fi (802_11G_2_4_GHZ)",
                                                "2g": "6/20",
                                                "5g": "116/80"
                                        }
                                ]
                        }
                ]
        }
}

To enable manual changes in Makefile required. Disabled by default.