Revision as of 14:54, 18 April 2017

Introduction

Topology for the tutorial04-caching.json file

In this tutorial, we will explore multiple characteristics of ICN using various tools of the CICN suite. We will deploy a topology containing a core network linking three local networks (e.g., 3 universities on the Internet2 network). In the studied scenario, two servers in university 3 are producing data that researchers at university 1 and 2 need to access.

We will use the following tools:

• vICN
• Metis, a socket-based ICN forwarder
• http-server and iget
• The producer-test and consumer-test commands, which are part of the libicnet

You should have been given access to a preconfigured Linux instance. Make sure that you have root access:

$ sudo -v

During this tutorial, we will use the Linux screen command. It is used to have several bash sessions on the same tty (in our case, on the same SSH connection). You can learn more about screen by reading its manual

$ man screen

vICN bootstrap

First, we will use vICN to start a topology. To do so, we will open a new screen called "vicn" and run our topology in it:

$ screen -S vicn
$ cd ~/vicn
$ sudo vicn/bin/vicn -s examples/tutorial/tutorial04-caching.json

You will see a lot of debugging appearing on the console, which describes what vICN is currently doing. In this tutorial, we will not get into the meaning of this logs but you are welcome to study it on your own to understanding everything that vICN does. You can detect that vICN has performed all his tasks when the log stops. The last lines should be similar to:

2017-04-18 14:24:49,845 - vicn.core.task - INFO - Scheduling task <Task[apy] partial<_task_resource_update>> for resource <UUID MetisForwarder-BS3XG>
2017-04-18 14:24:49,846 - vicn.core.resource_mgr - INFO - Resource <UUID MetisForwarder-BS3XG> is marked as CLEAN (245/202)

You can now observe the topology by connection to your machine HTTP server (we recommend that you use Google Chrome or Chromium, as Firefox does not always handle Javascript very well).

Leave the current screen by pressing CTRL+a and then d

First traffic generation

Now that the topology is deployed, we can create some traffic on the network. Let's start a producer on u3srv1 using the producer-test command. To do so, we open a screen and connect to the node:

$ screen -s u3srv1
$ sudo lxc shell u3srv1

We can now create some a producer for the /u3srv1/test1 prefix:

root@u3srv1:~# producer-test ccnx:/u3srv1/test1