anchor.diff:  
   *Limitations:*::
   
  -. It is assumed that most of the clients has MAC-addrees. at least 90% of the IP should have a MAC-addrees mapping.
  +. It is assumed that most of the clients has MAC addrees. at least 90% of the IP should have a MAC addrees mapping.
   
   === Destination mac address spreadings anchor:mac_spread[] 
   
  -Using this option, one can send traffic to a few destination devices. In normal mode all the packets are sent to the port destination mac-address.
  -to enable this option add this CLI `--mac-spread` to the command line
  +Using this option, one can send traffic to few destination devices. In normal mode all the packets are sent to the port destination mac-address.
  +to enable this option add `--mac-spread` to the command line.
   
   example:
   
  
positive.code: <6> TRex MAC-address destination port 
  <7> PBR configuration rules
  
  === Static source MAC-address setting  
  
  With this feature, TRex replaces the source MAC address with the client IP address.
  Note: This feature was requested by the Cisco ISG group. 
  
negative.code: <1> The number of translations with timeout should be zero. Usually this occurs when the router drops the flow due to NAT. 
  <2> Translation not found. This can occur when there is large latency in the router input/output queue.
  <3> Active number of TRex traslation flows, should be low in the case of low RTT.
  <4> A total of TRex translation. May be different from the total number of flows in case template is uni-directional (and such does not need translation).
  
  
  *Configuration for Cisco ASR1000 Series:*::
  