set int unnum ipip1 use pg1
ip route add 192.168.1.0/24 via ipip0
-set ip arp pg1 192.168.1.2 00:11:22:33:44:55
+set ip neighbor pg1 192.168.1.2 00:11:22:33:44:55
ip route add table 1 192.168.0.0/24 via ipip1
-set ip arp pg0 192.168.0.2 00:11:22:33:44:66
+set ip neighbor pg0 192.168.0.2 00:11:22:33:44:66
trace add pg-input 100