Grafana dashboard: RARE/freeRouter  - Routing / Interfaces

`scope:local` to freeRouter node

freeRouter Prometheus configuration: (copy & paste in freeRouter CLI)
```
 metric routing4 command sho ipv4 protocol inet | beg computed
 metric routing4 prepend routing_
 metric routing4 name 0 proto=
 metric routing4 addname 1 * id=
 metric routing4 skip 2
 metric routing4 column 2 name ifaces
 metric routing4 column 3 name neighbors
 metric routing4 column 4 name computed_unicast
 metric routing4 column 5 name computed_multicast
 metric routing4 column 6 name computed_flowspec
 metric routing4 column 7 name computed_changed
 metric routing4 column 9 name redisted_unicast
 metric routing4 column 10 name redisted_multicast
 metric routing4 column 11 name redisted_flowspec
 metric routing4 column 12 name redisted_changed

 metric routing6 command sho ipv6 protocol inet | beg computed
 metric routing6 prepend routing_
 metric routing6 name 0 proto=
 metric routing6 addname 1 * id=
 metric routing6 skip 2
 metric routing6 column 2 name ifaces
 metric routing6 column 3 name neighbors
 metric routing6 column 4 name computed_unicast
 metric routing6 column 5 name computed_multicast
 metric routing6 column 6 name computed_flowspec
 metric routing6 column 7 name computed_changed
 metric routing6 column 9 name redisted_unicast
 metric routing6 column 10 name redisted_multicast
 metric routing6 column 11 name redisted_flowspec
 metric routing6 column 12 name redisted_changed
```

{
  "__inputs": [
    {
      "name": "DS_PROMETHEUS",
      "label": "Prometheus",
      "description": "",
      "type": "datasource",
      "pluginId": "prometheus",
      "pluginName": "Prometheus"
    }
  ],
  "__requires": [
    {
      "type": "grafana",
      "id": "grafana",
      "name": "Grafana",
      "version": "7.2.0"
    },
    {
      "type": "panel",
      "id": "graph",
      "name": "Graph",
      "version": ""
    },
    {
      "type": "datasource",
      "id": "prometheus",
      "name": "Prometheus",
      "version": "1.0.0"
    }
  ],
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": "${DS_PROMETHEUS}",
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "limit": 100,
        "name": "Annotations & Alerts",
        "showIn": 0,
        "type": "dashboard"
      }
    ]
  },
  "editable": true,
  "gnetId": 13161,
  "graphTooltip": 0,
  "id": null,
  "iteration": 1662389419538,
  "links": [],
  "panels": [
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS}",
      "fieldConfig": {
        "defaults": {
          "custom": {}
        },
        "overrides": []
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 8,
        "w": 24,
        "x": 0,
        "y": 0
      },
      "hiddenSeries": false,
      "id": 2,
      "legend": {
        "avg": false,
        "current": false,
        "max": false,
        "min": false,
        "show": true,
        "total": false,
        "values": false
      },
      "lines": true,
      "linewidth": 1,
      "maxPerRow": 2,
      "nullPointMode": "null",
      "options": {
        "alertThreshold": true
      },
      "percentage": false,
      "pluginVersion": "7.2.0",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
      "repeat": "protocol",
      "repeatDirection": "h",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "routing${afi}_ifaces{node_name=\"$node_name\",proto=\"$protocol\"}",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "${protocol}",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "$$hashKey": "object:203",
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "$$hashKey": "object:204",
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    }
  ],
  "schemaVersion": 26,
  "style": "dark",
  "tags": [
    "[scope:local]"
  ],
  "templating": {
    "list": [
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_PROMETHEUS}",
        "definition": "label_values({__name__=~\"^routing${afi}.*\"},node_name)",
        "hide": 0,
        "includeAll": false,
        "label": null,
        "multi": false,
        "name": "node_name",
        "options": [],
        "query": "label_values({__name__=~\"^routing${afi}.*\"},node_name)",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "sort": 0,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      },
      {
        "allValue": null,
        "current": {
          "selected": false,
          "text": "4",
          "value": "4"
        },
        "hide": 0,
        "includeAll": false,
        "label": null,
        "multi": false,
        "name": "afi",
        "options": [
          {
            "selected": true,
            "text": "4",
            "value": "4"
          },
          {
            "selected": false,
            "text": "6",
            "value": "6"
          }
        ],
        "query": "4,6",
        "queryValue": "",
        "skipUrlSync": false,
        "type": "custom"
      },
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_PROMETHEUS}",
        "definition": "label_values(routing${afi}_ifaces{node_name=\"$node_name\"},proto)",
        "hide": 0,
        "includeAll": true,
        "label": null,
        "multi": true,
        "name": "protocol",
        "options": [],
        "query": "label_values(routing${afi}_ifaces{node_name=\"$node_name\"},proto)",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "sort": 0,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      }
    ]
  },
  "time": {
    "from": "now-6h",
    "to": "now"
  },
  "timepicker": {},
  "timezone": "",
  "title": "RARE/freeRouter  - Routing / Interfaces",
  "uid": "I7M4UF5Gk",
  "version": 6
}