[[PageOutline]] '''[wiki:GENIExperimenter/Tutorials/SystematicExprCaseStudy#ATutorialonSystematicExperimentalDesign A Tutorial on Systematic Experimental Design]''' '''[wiki:GENIExperimenter/Tutorials/SystematicExprCaseStudy/InstallSoftware Step I: Single Node]''' '''[wiki:GENIExperimenter/Tutorials/SystematicExprCaseStudy/SmallTopo Step II: Small Topology]''' '''[wiki:GENIExperimenter/Tutorials/SystematicExprCaseStudy/ScalingUp Step III: Scaling Up]''' {{{ #!html
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}}} = 3. End-to-End Validation = The RSpec file `4node-stitching.rspec` is modified from `4node-final.rspec` created in Step II, so all software has been installed to the slivers already. Open two terminals, and login to the `client` and `server`, respectively. Run `ping` and `traceroute` from the `client` to the `server` {{{ xuanliu@client:~$ ping 192.168.20.10 PING 192.168.20.10 (192.168.20.10) 56(84) bytes of data. 64 bytes from 192.168.20.10: icmp_req=1 ttl=61 time=151 ms 64 bytes from 192.168.20.10: icmp_req=2 ttl=61 time=75.8 ms 64 bytes from 192.168.20.10: icmp_req=3 ttl=61 time=75.7 ms 64 bytes from 192.168.20.10: icmp_req=4 ttl=61 time=75.9 ms ^C --- 192.168.20.10 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3004ms rtt min/avg/max/mdev = 75.733/94.731/151.416/32.728 ms xuanliu@client:~$ traceroute 192.168.20.10 traceroute to 192.168.20.10 (192.168.20.10), 30 hops max, 60 byte packets 1 router-1-lan0 (192.168.10.10) 0.583 ms 0.595 ms 0.561 ms 2 router-2-stitched0 (192.168.1.2) 38.909 ms 38.902 ms 38.865 ms 3 192.168.2.2 (192.168.2.2) 75.354 ms 75.341 ms 75.301 ms 4 192.168.20.10 (192.168.20.10) 75.501 ms 75.473 ms 75.432 ms xuanliu@client:~$ }}} From the `traceroute` result, we found that the delay between the `client` and `router-1`, the delay between `router-3` and the `server` were very small (about 0.5ms), this is because the end host and the associated router are from the same aggregate. However, the delay between `router-1` and `router-2` was about 38ms, and this reflected the delay between the aggregate located at Wisconsin and the aggregate located at New York City, and this shows the delay of the stitched link. '''[wiki:GENIExperimenter/Tutorials/SystematicExprCaseStudy/ScalingUp/DesignSetup Scaling Up: Design/Setup]''' '''[wiki:GENIExperimenter/Tutorials/SystematicExprCaseStudy/ScalingUp/Finish Scaling Up: Finish]'''