anchor.diff:  
   === TRex traffic generator
   
  -TRex traffic generator is a tool design the benchmark platforms with realistic traffic.
  -This is a work-in-progress product, which is under constant developement, new features are added and support for more router's fuctionality is achieved.
  -
  -One of the innovative tools through which TRex can be learned and tested during development is a virtual machine instance, fully simulating TRex without the need of any additional hardware.
  +TRex traffic generator is a tool designed to benchmark platforms using realistic traffic.
  +
  +One of the tools through which TRex can be learned and tested is a virtual machine instance, fully simulating TRex without the need for any additional hardware.
   
   
   ==== TRex Virtual Machine
   
   The TRex Virtual Machine is based on Oracle's Virtual Box freeware.
   
  -It is designed to enable TRex newbies to explore this tool without any special resources, and no single network cable attached. Moreover, is requires no internet or outer network connectivity.
  +It is designed to enable TRex newbies to explore this tool without any special resources.
   
   
   == Setup and Usage
   
   === Setup
   
  -In order to use TRex VM, there are several super-easy steps to follow:
  -
  -  . Download and install Oracle VM Virtual Box Manage https://www.virtualbox.org/wiki/Downloads[(VB download link)]. + 
  -    During the installation you'll be asked to allow the installation of system devices component interactions. Allow it.
  -  . Download the latest TRex VM by http://trex-tgn.cisco.com/trex/T_Rex_162_VM_Fedora_21.ova[clicking on this link].
  +In order to use TRex VM, there are several easy steps to follow:
  +
  +  . Download and install Oracle VM Virtual Box Manager https://www.virtualbox.org/wiki/Downloads[(VB download link)]. + 
  +    During installation you will be asked to allow the installation of system devices component interactions. Allow it.
  +  . Download the latest TRex VM by http://trex-tgn.cisco.com/trex/T_Rex_162_VM_Fedora_21.ova[clicking on this link]. Notice that this is the
  +    latest VM image, not the latest TRex version. This can be used for demonstration purposes. After installation, you can upgrade to latest
  +    TRex image if needed (Instructions below).
     . Open Oracle VM Virtual Box application installed at step 1.
  -  . Under 'File' tab, select 'Import Appliance' (`ctrl+I` shorthand can be used as well). The following screen will apear:
  +  . Under 'File' tab, select 'Import Appliance'. The following screen will apear:
   
   ifdef::backend-docbook[]
   image::images/vm_import.png[title="VM import screen",align="center",width=400, link="images/vm_import.png"]
  
positive.code: endif::backend-xhtml11[]
  
  
  TIP: a remote connection to the machine from anywhere in the hosting machine can be achieved by the following command: +
   `ssh -p 3022 trex@127.0.0.1`
  
  === Running TRex traffic generator
  
  Finally, we're ready to do some TRex magic. This is super easy and can be achived be the following steps:
  
    1. Change dir to latest version supplied using: `cd /home/trex/v1.62/`.
  
    2. Run your desired TRex command. 
  
  IMPORTANT: When launching a TRex command pay attention make sure that: +
    1. use `sudo` prefix at the beggining of the command. +
    2. Specify the `-f` argument first among all arguments.
  
  
  For example, let's run TRex with DNS traffic generation and no latency. The Runnning command is:
  
  ----
  [trex@localhost v1.62]$ sudo ./t-rex-64 -f cap2/dns.yaml -d 100 -m 1 --nc
  
negative.code: ===========================================
  :author: Dan Klein 
  :email: <danklei@cisco.com> 
  :revnumber: 2.0
  :quotes.++:
  :numbered:
  
  