Fix Mininet Examples in Module 2.0 Lecture

[feamster]

In week2 video "3 - 1 - Module 2.0- Mininet Topologies and Mininet Python API [16-35].mp4" there is an error with the code in the example at 10:30 min where 'from mininet.util import createLink' should be replaced by 'from mininet.topo import Topo'.

[feamster]

I've fixed the slides and uploaded the fixed PDF to Coursera, but the video should be edited/re-recorded.

This line needed to be deleted from Slide 6:
from mininet.util import createLink

Also, the mininet login is confusing:

OK on to week two, we now have a virtualbox GUI, with a VM named 'openflow tutorial', but what I have on my machine is
'Coursera-SDN_default_'

• which I guess has been running since last week...

Is this VM the same as the one in the first video on week 2? You do a login as 'mininet'.