Changes between Version 6 and Version 7 of HandoverTestbed
- Timestamp:
- 09/30/15 16:33:48 (9 years ago)
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HandoverTestbed
v6 v7 20 20 [[Image(ovs-show.jpg, align=center)]] 21 21 Figure (3) OVS Configuration 22 22 23 As shown in Figure (3), the OVS has three ports. Port “br_tap” is the local interface of the OVS Bridge. It will be used as the default interface for all application traffic. Port “wlan0” connects to the WiFi interface. Port “wmaxtun” is a gre tunnel to eth5 of the handover root node (130.127.38.133) built upon the WiMAX interface. Basically, application packets received at port “br_tap” will be forwarded out through either port “wlan0” or port “wmaxtun”. Forwarding out through “wlan0”/”wmaxtun” means that your application is using WiFi/WiMAX. 23 24 24 25 5. Run script “initial_flows_wifi.sh” (“initial_flows_flow.sh”) to indicate that your application will use WiFi (WiMAX) in the beginning. This will insert corresponding flow entry into the OVS. Figure (4) shows the flow entries after running “initial_flows_wifi.sh” 25 26 26 27 [[Image(initial-flow.jpg, align=center)]] 27 28 Figure (4) Initial Flow Entries for WiFi in OVS 28 29 29 30 6. Run script “dhclient_tap.sh” to get an IP for br_tap and meanwhile, notify the root node which network is currently being used (The root node needs to know which network is currently being used so that it knows which way it should use to send packets back to you). After this, you can see that br_tap has an IP address of “192.168.4.8”, as shown in Figure (5). 30 31 31 32 [[Image(ip-brtap.jpg, align=center)]] 32 33 Figure (5) IP of br_tap 33 34