anchor.diff:  [source,python]
   ----
   interface TenGigabitEthernet0/0/0
  - mac-address 0100.0001.0000                     <1>
  + mac-address 0000.0001.0000                     <1>
    mtu 4000                                       <2>
    ip address 11.11.11.11 255.255.255.0           <3>
    ip policy route-map p1_to_p2                   <4>
  
positive.code: 
  [source,python]
  ----
   arp 11.11.11.12 0200.0002.0000 ARPA  <1>
   arp 12.11.11.12 0400.0004.0000 ARPA  <2>
  ----
  <1> Destination mac-addrees of packets sent from If 0/0/0 is matched to TRex source mac-address port-0
  <2> Destination mac-addrees of packets sent from If 0/0/1 is matched to TRex source mac-address port-1
  
negative.code: * to send only from TRex port 1 do this:
  ...........................................
  $./t-rex-64 -f cap2/dns.yaml -m 1  -d 100  -l 1000 --lo --lm 2
  ...........................................
  
  * In case you are connected to a Switch you must send packet from both direction first 
  
  ...........................................
  $./t-rex-64 -f cap2/dns.yaml -m 1  -d 100  -l 1000 
  ...........................................
  
  
  