Starting out with cnet

1. Get my example topology file UTOPIA and the corresponding source file utopia.c. Read them both.
2. Run UTOPIA on turing using the command "cnet -s -T -M 10 UTOPIA". What do -s, -T, and -M 10 do? (Check the cnet documentation.)
3. Try messing with the link and node properties in UTOPIA (many options are described in the documentation) and see how the end-of-run statistics change.
4. What do the various statistics reported mean? Can you make them change in predictable ways by modifying either UTOPIA or utopia.c?
5. Get Chris McDonald's example topology file TICKTOCK and source file ticktock.c. Read them.
6. Run the TICKTOCK example. Why does it stutter? Can you make it stop?
7. What's missing from the end-of-run report, as compared to the reports you got for UTOPIA? Why?
8. Rewrite ticktock.c to make the nodes pass a "token" back and forth. For example, they could pass a counter n from one to the other. Whenever node 0 gets the counter with value n from its physical layer, it prints "tick n" and, say, adds 2 to n before sending the counter back to node 1. Node 1 can say "tock n" upon receipt, and add 3 to n before shipping it back. Or whatever. Give it a whirl.