15 | | 1. Follow the [http://groups.geni.net/geni/wiki/GENIExperimenter/Tutorials/SystematicExprCaseStudy/SmallTopo/Execute instructions on this page] to send traffic and bring interfaces and nodes up and down. |
16 | | |
| 15 | 1. Send traffic and bring interfaces and nodes up and down [http://groups.geni.net/geni/wiki/GENIExperimenter/Tutorials/SystematicExprCaseStudy/SmallTopo/Execute as before]. |
| 16 | * The [http://groups.geni.net/geni/wiki/GENIExperimenter/Tutorials/SystematicExprCaseStudy/SmallTopo/Execute previous instructions] were customized to the 4-node topology. |
| 17 | * Use the actual IP address of the server node (`192.168.11.101`) for the `ping`, `traceroute`, and both `iperf` commands. |
| 18 | * When bringing down the router and it's interfaces, pick a router that appears in the path between `client` and `server` as shown by the `traceroute` command. (For example, if `traceroute` reports the path used as `router-1 -> router-3 -> router-5 -> router-7` then consider bringing down interfaces on `router-3`. Check that the interface that you are bringing down is on the four router path shown by traceroute. For example, `eth1` might have IP address `10.10.3.2` which connects to `router-2`. So you would then bring down `eth1` using `ifconfig`. After you bring down `router-3`, the path shown by `traceroute` might look like `router-1 -> router-2 -> router-4 -> router-7`. |