Exercises lb

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/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

  mininet> xterm h1
  mininet> xterm h2

  h1$ python –m SimpleHTTPServer 80
  h2$ python –m SimpleHTTPServer 80

• • Get webpage from clients (h3)

  mininet> 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