# meta nfproto ipv4 rt nexthop 192.168.0.1 [ { "match": { "left": { "meta": { "key": "nfproto" } }, "op": "==", "right": "ipv4" } }, { "match": { "left": { "rt": { "family": "ip", "key": "nexthop" } }, "op": "==", "right": "192.168.0.1" } } ]