Changes between Version 115 and Version 116 of GENIExperimenter/Tutorials/OpenFlowOVS/Execute

Timestamp:

03/02/15 11:46:42 (10 years ago)

Author:

rrhain@bbn.com

Comment:

--

GENIExperimenter/Tutorials/OpenFlowOVS/Execute

@@ -26 +26 @@
 To get ready for the tutorial you will need to have the following windows open:
   * one window with ssh into the controller
-  * two windows with ssh into OVS
+  * four windows with ssh into OVS
   * one window with ssh into host1 
   * two windows with ssh into host2 
@@ -229 +229 @@
 === 3d. Run a traffic duplication controller ===
 
-In the above example we ran a very simple learning switch controller. The power of !OpenFlow comes from the fact that you can decide to forward the packet anyway you want based on the supported !OpenFlow actions. A very simple but powerful modification you can do, is to duplicate all the traffic of the switch out a specific port. This is very useful for application and network analysis. You can imagine that at the port where you duplicate traffic you connect a device that does analysis. For this tutorial we  are going to verify the duplication by doing a `tcpdump`  on a port on the OVS switch. 
+In the above example we ran a very simple learning switch controller. The power of !OpenFlow comes from the fact that you can decide to forward the packet anyway you want based on the supported !OpenFlow actions. A very simple but powerful modification you can do, is to duplicate all the traffic of the switch out a specific port. This is very useful for application and network analysis. You can imagine that at the port where you duplicate traffic you connect a device that does analysis. For this tutorial we  are going to verify the duplication by doing `tcpdumps`  on ports on the OVS switch. 
 
   1. Use the interfaces that are connected to `host2` and  `host3`. 
@@ -235 +235 @@
     * Hardware Switch:   Refer to this Section to figure out ports: [http://groups.geni.net/geni/wiki/GENIExperimenter/Tutorials/OpenFlowHW/DesignSetup#a2a.ConfiguretheControllerfortheHardwareSwitch:UsefulTips UsefulTips].  If you are using a hardware switch, you may not see the traffic on host3, but if you observe your controller output, you will notice that flows are being installed for forwarding to host2 and host3.[[BR]]
    
-  To see that duplication is happening, on host3, run:  
-  {{{
-sudo tcpdump -i <data_interface_name>
-  }}}
-
-  You should see ICMP echo and ICMP reply lines from host1 to host2 showing up in the host3 tcpdump window.
+  To see that duplication is happening, on the ovs host, run:  
+  {{{
+sudo tcpdump -i <data_interface_name>  [using the data_interface to host2]
+sudo tcpdump -i <data_interface_name>  [using the data_interface to host3]
+  }}}
+
+You should see traffic from host1 to host2 showing up in the tcpdump window for host3.  As a comparison, you will notice that no traffic shows up in that window when the controller is running the learning switch.
   2. In the controller host directory `/tmp/pox/ext` you should see two files:
 
@@ -364 +365 @@
 ----
 
-= [wiki:GENIExperimenter/Tutorials/OpenFlowOVS/DesignSetup Design and Setup for OVS] =
-= [wiki:GENIExperimenter/Tutorials/OpenFlowHW/DesignSetup  Design and Setup for Hardware Switch] =
+= [wiki:GENIExperimenter/Tutorials/OpenFlowOVS/DesignSetup Prev: Design and Setup for OVS] =
+= [wiki:GENIExperimenter/Tutorials/OpenFlowHW/DesignSetup Prev: Design and Setup for Hardware Switch] =
 = [wiki:GENIExperimenter/Tutorials/OpenFlowOVS/Finish Next:  Finish] =