= Path Controller =
As an example experiment, we have set up a [http://geminiportal.uky.emulab.net/path_controller Path Controller] tool. Click on the link or goto http://geminiportal.uky.emulab.net/path_controller . Accept the self-signed certificate.

Log on using the information on your handout.
[[Image(path_controller_logon.png)]]



The tool consist of a web interface that connects to the slice's nodes and allows you to change the routing paths and generate traffic between selected nodes. The interface has desktop-like windows that can be moved around and resized as you please. 
[[Image(path_controller_init_view.png)]]

The first window we will examine contains the slice's topology.
[[Image(topo_init_view.png)]]
Each circle represents a node in the network. The lines represent links. Note that the global node (GN) does not have links, it acts in the background. Left click and drag a link to rearrange them. For this tutorial arrange them so they match the geminiportal layout like so:

[[Image(topo_rearranged_view.png)]]

As you rearrange the nodes, note the window directly below the topology window. This is the information (Info) window.

[[Image(info_window.png)]]

This window has some brief information about the node or link that the cursor is currently over. This case has information about VM-1. The icon represents a virtual machine. The hostname is pcvm63-2.uky.emulab.net.

[[Image(info_window_vm1.png)]]

This next case is for lan1. The icon represents a link. The ids are displayed for the two end points, along with each interface's ip address.

[[Image(info_window_lan1.png)]]

== Create Traffic ==

The window with the [[Image[add_generator_button.png)]] button is the Traffic Generator.
Click the button to add a Traffic Generator.
[[Image(new_generator.png)]]