Changes between Version 2 and Version 3 of GENIExperimenter/Tutorials/GREESC13/OpenFlowWiMAX/Execute

Timestamp:

06/24/13 15:40:28 (11 years ago)

Author:

Ryan Izard

Comment:

--

GENIExperimenter/Tutorials/GREESC13/OpenFlowWiMAX/Execute

@@ -12 +12 @@
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-href="http://groups.geni.net/geni/wiki/GENIExperimenter/Tutorials/OnlineTemplate/Finish" alt="" title=""    />
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@@ -401 +401 @@
 two? OpenFlow filters packets by not only data like MAC and IP addresses, but also by the type of packet (its 
 '''ethertype'''). We need to forward all IP (ethertype=0x800) and all ARP (ethertype=0x806) packets in each direction in 
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 order to achieve IP connectivity between the tap interface and the outside world. What we want to do is look for packets 
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 from the port br_tap is assigned to, then send them out the tap-wifi port number (the patch port connected to the br_wifi 
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 OVS bridge), then when they arrive at br_wifi, look for them on the wifi-tap port number and send them out the br_wifi 
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 port number. Then we want to implement the same for the opposite direction. Examine the script and modify it as necessary 
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 to allow packets to travel from the br_tap interface, to the br_wifi interface, and out to the host-only network.
    7.  Save the '''gree13_switchWiFi.py''' script.
    8.  Repeat and save for '''gree13_switchWiMAX.py'''. Use the port numbers noted in the json output to complete the 
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 flows needed to send packets from the br_tap interface out the br_wimax interface.
-
 
 == 5.  Execute Experiment ==
@@ -431 +424 @@
    }}}
    2.  In another unused tab in the Root Terminal, run ping to the gateway IP. The default route is set to br_tap and IP 
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 forwarding is disabled -- this forces all packets into the OVS network, where the interface switching is handled by 
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 Floodlight and the Static Flow Pusher.
    {{{
@@ -454 +445 @@
 
    1.  Notice the delay introduced in the ping responses. When we configured and ran the '''system_setup.sh''' script, we 
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 introduced a simulated delay to the "WiMAX" interface. This confirms the switch is occuring. Before and after the switch, 
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 the source IP remains the br_tap IP, and the destination IP remains the gateway IP.
    2.  Congratuations! You have just completed a simulated vertical Layer-2 handoff! This project is being developed and 
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 tested using actual GENI WiFi and WiMAX testbed at Clemson University. You can give it a try yourself outside the VM using 
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 whatever physical interfaces you have available.