Exercises pyretic debugging: Difference between revisions
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** The basic solution is taken from the Internet [https://dl.dropboxusercontent.com/u/1652374/SDN_Course/Exercises/pyretic_gardenwall_internetsolution1.py], test if it is able to block h1 when "infected". Note that we will only use the "infected == True" for this exercise. | ** The basic solution is taken from the Internet [https://dl.dropboxusercontent.com/u/1652374/SDN_Course/Exercises/pyretic_gardenwall_internetsolution1.py], test if it is able to block h1 when "infected". Note that we will only use the "infected == True" for this exercise. | ||
*** Copy the above code into /home/mininet/pyretic/pyretic/examples as pyretic_gardenwall_internetsolution.py | *** Copy the above code into /home/mininet/pyretic/pyretic/examples as pyretic_gardenwall_internetsolution.py | ||
*** start controller (in /home/mininet/pyretic folder): pyretic.py pyretic.examples. | *** start controller (in /home/mininet/pyretic folder): | ||
*** start mininet: sudo mn --controller=remote --topo=single,3 --mac --arp | $pyretic.py pyretic.examples.pyretic_gardenwall_internetsolution | ||
*** start mininet: | |||
$ sudo mn --controller=remote --topo=single,3 --mac --arp | |||
*** check h1 ping h2 | *** check h1 ping h2 | ||
*** Now infect h1 (in /home/mininet/pyretic/pyretic/kinetic folder): python json_sender.py -n infected -l True --flow="{srcmac=00:00:00:00:00:01}" -a 127.0.0.1 -p 50001 | *** Now infect h1 (in /home/mininet/pyretic/pyretic/kinetic folder): | ||
$ python json_sender.py -n infected -l True --flow="{srcmac=00:00:00:00:00:01}" -a 127.0.0.1 -p 50001 | |||
**** NOTE: it is a "small L(-l) and not numeric 1" | **** NOTE: it is a "small L(-l) and not numeric 1" | ||
**** Note what happens on the pyretic window | |||
*** check h1 ping h2. We should be able to observe that this traffic is blocked. | *** check h1 ping h2. We should be able to observe that this traffic is blocked. | ||
** (Not Needed): Try fixing [https://dl.dropboxusercontent.com/u/1652374/SDN_Course/Exercises/pyretic_gardenwall_internetsolution.py this] code for the "infected" case. | == Now, we move on to the debugging part == | ||
* check h2 ping h3, what happens? | |||
* Now, modify the given code to allow h2 traffic to pass through to h3, when h1 is "infected". | |||
* Now, check if the "exempt" case is working fine too (i.e if h1 is "infected" and "exempt", send it to h3 instead of blocking it) | |||
$ python json_sender.py -n exempt -l True --flow="{srcmac=00:00:00:00:00:01}" -a 127.0.0.1 -p 50001 | |||
** (Extra: Not Needed): Try fixing [https://dl.dropboxusercontent.com/u/1652374/SDN_Course/Exercises/pyretic_gardenwall_internetsolution.py this] code for the "infected" case. | |||