4.05-2. Generalized forwarding: specifying a flow table entry (b). Consider the three-node network below, that uses flow-based generalized forwarding (e.g., as in OpenFlow) in the network's routers. In the question below, we'll want to create match+action entries in the flow table at router r2, with three ports labelled 1,2,3 (in black). In the question, matches are constrained to be over only four fields: the IP source address, the IP destination address, the upper-layer protocol field of the IP datagram, and the destination port number of the transport-layer segment. The actions are either to drop or to forward(i), that is, to forward a matching packet on port i. The default action (unless stated otherwise) is that if a packet doesn't match a rule, it will be dropped. (b) Suppose we want to implement the following behavior, and that the default configuration is that all traffic from 22.33/16 should be allowed to be forwarded by r2 to the outsidenetwork. However, we also want to implement a higher priority rule (which would be earlier in the table, for example) so that users within the 22.33/16 network are never allowed toconnect to an external web server on port 80. Specify the flow table row entries to implement this rule, by indicating the column entries below. The * is a wildcard match, whichmatches everything - you should use * over more specific answers whenever possible.[Note: You can find more examples of problems similar to this here.]C. v In the "source IP" column, the flow table entry should be:A. v In the "dest. IP" column, the flow table entry should be:D. v In the "dest port" column, the flow table entry should be:F. V In the "action" column, the flow table entry should be:A. 128.119/16B. forward(1)C. 22.33/16D. 80E. UDPF. dropG. forward(2)H. 53.106/16I. C OpenFlowcontroller128.119/16r34253.106/16322.33/162matchactionsource IPdest. IPprotocoldest. portwwТСР.........

To do what is written in part b) we need to drop all such addresses which can connect to the sever…

Answered: 4.05-2. Generalized forwarding:…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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4.05-2. Generalized forwarding: specifying a flow table entry (b). Consider the three-node network below, that uses flow-based generalized forwarding (e.g., as in OpenFlow) in the network's routers. In the question below, we'll want to create match+action entries in the flow table at router r2, with three ports labelled 1,2,3 (in black). In the question, matches are constrained to be over only four fields: the IP source address, the IP destination address, the upper-layer protocol field of the IP datagram, and the destination port number of the transport-layer segment. The actions are either to drop or to forward(i), that is, to forward a matching packet on port i. The default action (unless stated otherwise) is that if a packet doesn't match a rule, it will be dropped.