Understanding the AM API using Content Centric Networking

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1. Design the Experiment

  1. In today's experiment you will use resources at the aggregate assigned to you by the tutorial leader

2. Establish the Environment

2.1 Set up ssh keys and configure Omni

If your account is from the GENI Portal follow the instructions in the Section 2 of this exercise.

If your account is from the iMinds member authority ( follow the instructions at

3. Obtain Resources

3.2. Load the experiment topology

For this exercise, we will edit an existing RSpec file. Start by loading this predefined topology into jFed.

  1. Launch jFed.
  2. Click on the Open URL menu (see figure)
    • If you have been assigned aggregate wall1, enter the url
    • If you have wall2, enter
Import an RSpec into jFed
Figure 3-1 Import an RSpec into jFed.
  1. You should see a 4-node linear topology. Double-click on each node to make sure you are using the aggregate assigned to you ( iMinds Virtual Wall 1 or iMinds Virtual Wall 2 . If needed, change the aggregate from the drop-down list and click Save. Do this for all nodes
Import an RSpec into jFed width=500
Figure 3-2 Make sure resource is being requested from the correct aggregate.

3.3. View and Modify the RSpec

For this experiment, we need to install the following software on the nodes:

  • The CCNX software (ccnx-0.6.1-F15-x64.tar.gz)
  • Scripts that set up the CCNX software (ccnx-setup.tar.gz)
  • Scripts used to pull atmospheric precipitation data using the CCNX protocol (ccnx-atmos-F15-x64.tar.gz)

When the nodes start up, we need the following scripts to be executed:

  • Script that sets up the node (node-setup)
  • Script that sets up the ccnx protocol (ccnx-setup)
  • Script that setup up ccnx protocol routes (add-precip-routes)

We automate the installation and running of the software using install and execute scripts in the RSpec. Let's view the RSpec we uploaded.

  1. Click on the RSpec Editor tab on the jFed tools.
  2. Study this RSpec looking for node specifications. Pay special attention to how the scripts to install and execute the CCN software.
View and edit an RSpec in jFed
Figure 3-3 View and edit an RSpec in jFed.

3.5. Save the request RSpec in a Local File

For this tutorial we will use the Omni tool to create a slice and add resources to the slice.

  1. Save the RSpec to a file by clicking on the Save button.
  2. Remember the name of the RSpec file and its location.
Saving a Request RSpec from jFed
Figure 3-4 Saving a Request RSpec from jFed.

3.6. Instantiate the new experiment using Omni

Omni is a command line tool. Open a terminal window to run Omni commands.

Create a slice. From a terminal, enter the command:

$ omni createslice SLICENAME

Get resources by submitting your request RSpec. Use the Omni createsliver command:

$ omni -a AM_URL createsliver SLICENAME RSPEC_FILE

where AM_URL is the URL for your assigned aggregate, SLICENAME is the name of your slice and RSPEC_FILE is then name of file with your RSpec.

For wall1, use the AM_URL
For wall2, use the AM_URL

If all is well, the output from Omni will end with something like:

Result Summary: Got Reserved resources RSpec from www-wall1-ilabt-iminds-be-protogeniv2}}}

and your resource reservation is complete!


Next: Execute

Last modified 10 years ago Last modified on 07/07/14 04:22:14

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