Changes between Version 37 and Version 38 of GENIExperimenter/Tutorials/jacks/GettingStarted_PartII_ndn/Procedure/Execute


Ignore:
Timestamp:
07/01/16 17:38:04 (8 years ago)
Author:
tteixeir@bbn.com
Comment:

--

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  • GENIExperimenter/Tutorials/jacks/GettingStarted_PartII_ndn/Procedure/Execute

    v37 v38  
    5757   * A principal investigator node, called {{{PI}}} and a experimenter node, called {{{Experimenter}}} that will send {{{Interest}}} requests to the {{{Custodian}}} via UDP tunnels.
    5858
    59 Download the scripts and Python codes to your host machine and extract it.
    60    * [http://192.1.242.151/files/ndn-tutorial.gz ndn-tutorial.gz]
    61                  
    62 Or alternatively,
     59                         
     60Once the topology is up, logon to the {{{Custodian}}} node and restart the NDN Forwarding Daemon.
    6361     {{{ 
    64      $ wget http://192.1.242.151/files/ndn-tutorial.gz
    65      $ tar -xvf ndn-tutorial.gz
    66      }}} 
    67                  
    68 In the '''ndn-tutorial-config.sh''' configuration file, edit the fields according to your GENI username, SSH key, GENI Aggregate name, pc and port numbers. [[br]]
    69 Keep the quotes format unchanged, otherwise the script may not run.
    70                  
    71 Once the topology is up, run {{{copy-scripts.sh}}}, this will automatically transfer the necessary files to the nodes in our topology.
    72      {{{ 
    73      $ ./copy-scripts.sh
     62     $ cd /local
     63     $ sudo ./install_script.sh
    7464     }}}
    7565
    76 Login into the node {{{Custodian}}} and re-start the NDN Forwarding Daemon (NFD). This will make sure the content store is refreshed and the routes are cleared.
    77      {{{
    78      $ nfd-stop
    79      $ nfd-start
    80      }}}
    8166
    82 wait until the shell prompt returns (~ a few seconds). The NFD is now up and running.
    83 
    84 === 5.1 Run the NDN application on the same node ===
    85 
    86 You are now ready to start the producer application and register a namespace. ^([#hn note: you can try other namespaces as well])^[[br]]
     67=== 5.1 Run the NDN application on the entire topology ===
     68We are now ready to run our experiment.[[br]]
     69On the {{{Custodian}}} node, start the {{{producer}}} application ^([#hn note: you can try other namespaces as well])^ [[br]]
    8770The producer application will listen for {{{Interest}}} requests of a namespace {{{-n}}} and reply with {{{Data}}} packets.
    8871     {{{
    89      $ cd /local
    90      $ python producer.py -n /nytimes
    91      }}}
    92 You should see a message
    93      {{{
    94      $ Registering prefix /nytimes
    95      }}}
    96 Open another terminal on the {{{Custodian}}} node and run
    97      {{{
    98      $ cd /local
    99      $ python consumer.py -u /nytimes/science
    100      }}}
    101 This will start the consumer application that will send {{{Interest}}} request packets to the producer. Take a moment to look at the entries in the NFD.
    102 You are all set. Stop the producer application by {{{Ctrl + C}}} and stop the NFD
    103      {{{
    104      $ nfd-stop
    105      }}}
    106 
    107 === 5.2 Run the NDN application on the entire topology ===
    108 In this section, we are going to start the NFD and register the forwarding faces on the remaining nodes. We have automated these tasks for the {{{Campus-Router}}}, {{{Internet-Router}}}, and {{{PI}}} nodes using a script. On your host machine, do the following:
    109      {{{ 
    110      $ ./setup-app.sh
    111      }}}
    112 
    113 We are now ready to run our experiment.[[br]]
    114 SSH to the {{{Custodian}}} node and start the {{{producer}}} application
    115      {{{
    116      $ python producer.py -n /nytimes
     72     $ sudo python /local/producer.py -n /nytimes
    11773     }}}
    11874
    11975SSH to the {{{Experimenter}}} node, and start the consumer application
    12076     {{{
    121      $ python consumer.py -u /nytimes/science
     77     $ time sudo python /local/consumer.py -u /nytimes/science
    12278     }}}
    123 This time the {{{Interest}}} request travels the entire topology, leaving breadcrumbs. The {{{Data}}} packet follows the breadcrumbs back to the {{{consumer}}}, leaving cached versions of the content. This is call in-network caching and it is one of the most important features in {{{Information Centric Networking (ICN)}}}
     79The {{{Interest}}} packet travels the entire topology, leaving breadcrumbs. The {{{Data}}} packet follows the breadcrumbs back to the {{{consumer}}}, leaving cached versions of the content. This is call in-network caching and it is one of the most important features in {{{Information Centric Networking (ICN)}}}
    12480You can check this phenomenon by running the same consumer application in the {{{PI}}} node.
    12581SSH to the {{{PI}}} node and start the consumer application
    12682     {{{
    127      $ python consumer.py -u /nytimes/science
     83     $ time sudo python /local/consumer.py -u /nytimes/science
    12884     }}}
    129 This time your {{{PI}}} node gets the content back, but nothing happens on the {{{Custodian}}} because the requested content is cached in the {{{Campus Router}}} node.
     85This time your {{{PI}}} node gets the content back, but nothing happens on the {{{Custodian}}} because the requested content is cached in the {{{Campus Router}}} node.[[br]]
     86Note that this time the [[[Data}}} was retrieved much faster.[[br]]
    13087You can repeat the experiment with different namespaces
    13188     {{{
    132      $ python consumer.py -u /nytimes/math
     89     $ time sudo python /local/consumer.py -u /nytimes/math
    13390     }}}
    13491This time you see that the {{{Interest}}} request is served by the {{{Custodian}}}.
    13592
    136 === 5.3 (Optional) Visualize experiment data flows ===
     93=== 5.2 (Optional) Visualize experiment data flows ===
    13794   To use the GENI Desktop to visualize the data flows in your network, continue with the instructions [wiki:GENIExperimenter/Tutorials/jacks/GettingStarted_PartII_ndn/Procedure/Execute/GEMINI here].
    13895