[R1] Explore a Simple Pre-Configured Experiment

New Concepts: RLI familiarity, route (forwarding) tables, VOQ
Review:
• xxx
Configuration File:
Get the configuration file cfg-route-1nsp-simple.exp and store it in the file system of the host where you plan to run the RLI. I usually put it in the same directory where my RLI.jar file is stored.
Description:
In this part of the exercise, you will be asked to familiarize yourself with a pre-existing experiment file. You will NOT connect to the ONL testbed until the following section. This means that you will not and SHOULD NOT make a resource reservation. But you will be asked to determine various configuration parameter values by opening various RLI menus.

Start the RLI, open the cfg-route-1nsp-simple.exp configuration file, and answer the following questions by viewing the appropriate RLI menus. Hint: You can determine parameters values by using the left or right mouse buttons and selecting appropriate icons in the RLI.

Questions:
Consider a packet P that enters port 2 with a destination IP address of D where D is specified below.

1. Which route entry will be used at port 2 if D = 192.168.1.33? Explain.
2. Which route entry will be used at port 2 if D = 192.168.1.64? Explain.
3. For D = 192.168.1.33, indicate the path (i.e., sequence of ingress ports, egress ports and host interfaces) taken through the router once P enters ingress port 2. Explain.
4. What changes to the routing table at port 2 would be needed to forward packets to port 0 when D = 192.168.1.X where X is between 118 and 121 inclusive. Explain.
5. What is the capacity (Mbps) of the egress link at port 3? Port 4? Hint: See Tutorial => Filters, Queues and Bandwidth => Modifying Link Rate
6. What is the capacity (Mbps) of the switch fabric?
7. Why are there eight (8) VOQs at each input port?
8. Suppose that we have a steady stream of UDP packets entering port 2 that are destined for port 3. At what input rate (Mbps) would a queue begin to build at VOQ(2,3)? Explain.