Dear students,
Some of you have trouble configuring the communication between the four PCs in part3, due to the naming of the interfaces on PC4. The names of those interfaces are given automatically by mininet in the order they were defined in the python script. In order to be consistent with the naming given in the pdf file, please make sure that the first link you define is the one between PC4 and PC1, the second one between PC4 and PC2 and so on. To ensure that your configuration is correct, you can use the "net" command of mininet.
Best,
Plouton
