= [http://groups.geni.net/geni/wiki/GENIExperimenter/Tutorials/StitchingTutorial GENI Inter-Aggregate Stitching Tutorial] = {{{ #!html
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}}} = Step 4: Execute Experiment = To run the experiment we will use two terminals to login to the ''"right-client"'' and the ''"left-client"'' VMs and one browser to connect to the ''"server"'' VM to review results. '''1.''' Start 2 terminal windows and use the `readyToLogin` script to determine the login information for the client hosts: Window 1: {{{ $ readyToLogin -a rightAggr MySlice .... $ ssh -i right-client.... ... }}} Window_2: {{{ $ readyToLogin -a leftAggr MySlice ... $ ssh -i left-client.... ... }}} '''2.''' Now let's compare the Round Trip Time over each link type. In the ''"right-client"'' terminal issue: {{{ right-client$ ping -c 20 192.168.1.2 --- 192.168.1.2 ping statistics --- 20 packets transmitted, 20 received, 0% packet loss, time 19020ms rtt min/avg/max/mdev = 65.143/68.522/132.324/14.640 ms }}} In the ''"left-client"'' terminal issue: {{{ left-client$ ping -c 20 10.10.1.2 --- 10.10.1.2 ping statistics --- 20 packets transmitted, 20 received, 0% packet loss, time 19000ms rtt min/avg/max/mdev = 0.057/0.126/1.192/0.244 ms }}} '''3.''' Start a browser and navigate to the ''"server's"''s hostname from the readyToLogin output in previous step. For this example experiment the hostname allocated is pcvm1-15.instageni.stanford.edu: [[Image(GENIExperimenter/Graphics:server-web.jpg,65%)]] '''4.''' Now let's generate some traffic to determine how much capacity we can use on each link type: In the ''"right-client"'' window issue: {{{ right-client$ /usr/bin/iperf -c 192.168.1.2 -t 30 -P 5 }}} In the ''"left-client"'' window issue: {{{ left-client$ /usr/bin/iperf -c 10.10.1.2 -t 30 -P 5 }}} '''5.''' Back in the browser. Refresh the web page and you should see the results for both iperf tests: ''Note: '' The interface capacity for all links was set to '' '''20 Mbits/sec''' '' in the RSpec used for this tutorial. [[Image(GENIExperimenter/Graphics:server-web2.jpg)]] '''6.''' Time permitting! Let's exchange some layer 2 traffic by using PingPLus. Add a third terminal window which is logged into the ''"server"'' host. Determine the 2 Data Plane interfaces and shutdown the two interfaces. Take note of the MAC address for the 192.168.1.2 and 10.10.1.2 interfaces and start the ping listener. {{{ server$ sudo /sbin/ifconfig ethXXX 0 server$ sudo /sbin/ifconfig ethYYY 0 server$ sudo /local/stitch-tutorial/pingPlus_v3/pingPlusListener 10000 }}} ''Note:'' A ping listener process was started for you by the installation script. In the ''"right-client"'' window shutdown the dataplane interface (ethXXX) and run layer2 ping to ''"server's"'' MAC address (192.168.1.0 network) via the ethXXX interface: {{{ right-client$ sudo /sbin/ifconfig ethXXX 0 right-client$ sudo /local/stitch-tutorial/scripts/runPingPlus.sh XX:XX:XX:XX:XX:XX ethXXX }}} In the ''"left-client"'' window shutdown the dataplane interface (ethYYY) and run layer2 ping to ''"server's"'' MAC address (10.10.1.0 network) via the ethYYY interface: {{{ left-client$ sudo /sbin/ifconfig ethYYY 0 left-client$ sudo /local/stitch-tutorial/scripts/runPingPlus.sh YY:YY:YY:YY:YY:YY ethYYY }}} The experiment is now completed; time to release resources! = [http://groups.geni.net/geni/wiki/GENIExperimenter/Tutorials/StitchingTutorial Introduction] = = [http://groups.geni.net/geni/wiki/GENIExperimenter/Tutorials/StitchingTutorial/Finish Finish] =