-set ip neighbor static GigabitEthernet0/6/0 1.1.1.2 $vif1_mac
-set ip neighbor static GigabitEthernet0/7/0 1.1.2.2 $vif2_mac
+set ip neighbor static GigabitEthernet0/6/0 1.1.1.2 $vif1_mac[0]
+set ip neighbor static GigabitEthernet0/7/0 1.1.2.2 $vif2_mac[0]