Question 19 and 20.

P19. Consider the SDN OpenFlow network shown in Figure 4.30. Suppose that the desired forwarding behavior for datagrams arriving at s2 is as follows: any datagrams arriving on input port 1 from hosts h5 or h6 that are des tined to hosts hl or h2 should be forwarded over output port 2; any datagrams arriving on input port 2 from hosts hl or h2 that are des tined to hosts h5 or h6 should be forwarded over output port 1; any arriving datagrams on input ports 1 or 2 and destined to hosts h3 or h4 should be delivered to the host specified; hosts h3 and h4 should be able to send datagrams to each other. Specify the flow table entries in s2 that implement this forwarding behavior. P20, Consider again the SDN OpenFlow network shown in Figure 4.30. Suppose that the desired forwarding behavior for datagrams arriving from hosts h3 or h4 at S2 is as follows: any datagrams arriving from host h3 and destined for hl, h2, h5 or h6 should be forwarded in a clockwise direction in the network; any datagrams arriving from host h4 and destined for hl, h2, h5 or h6 should be forwarded in a counter-clockwise direction in the network. Specify the flow table entries in s2 that implement this forwarding behavior