Exercises lb

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Exercise: Load balancers

Setup will be as shown in Figure [1]
(40P) Pre-defined servers
- AIM: Http requests from different clients will be directed to different pre-defined servers
- $ sudo mn --topo single,6 --mac --arp --controller remote
- $ ./pox.py log.level –-DEBUG misc.ip_loadbalancer –-ip=10.0.1.1 –-servers=10.0.0.1,10.0.0.2
- Start HTTP servers on h1, h2
  - > xterm h1,h2
  - h1$ python –m SimpleHTTPServer 80
  - h2$ python –m SimpleHTTPServer 80
- Get webpage from clients (h3)
  - > xterm h3
  - h3$ curl 10.0.1.1
- Observe in Pox controller, which server is it connecting to. Continue to obtain webpage from the same client and one other client and observe the results
  - Are both servers getting an equal share

(60P) Modified Load_balancer
- Now modify pox/pox/misc/ip_loadbalancer.py to select server in a round robin fashion

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