+ tmp_f1.write(
+ 'exec create loopback interface\n'
+ 'exec set interface state loop0 up\n'
+ 'exec set interface ip address {uifc} {iaddr}/24\n'
+ .format(
+ iaddr=ip_address(unicode(if2_ip_addr)) - 1,
+ uifc=Topology.get_interface_name(nodes['DUT1'], if1_key)))
+ tmp_f2.write(
+ 'exec set interface ip address {uifc} {iaddr}/24\n'
+ .format(
+ iaddr=ip_address(unicode(if2_ip_addr)),
+ uifc=Topology.get_interface_name(nodes['DUT2'], if2_key)))