:ingress;type filter hook ingress device lo priority 0 :egress;type filter hook egress device lo priority 0 *netdev;test-netdev;ingress,egress fwd to "lo";ok fwd to meta mark map { 0x00000001 : "lo", 0x00000002 : "lo"};ok fwd ip to 192.168.2.200 device "lo";ok