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Internetworking with TCP/IP: Pearson New International Edition

Douglas E. Comer

Chapter 28

Software Defined Networking (SDN, OpenFlow) - all with Video Answers

Educators

Chapter Questions

Problem 1

If your organization uses an SDN technology, find out why.

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Problem 2

A pipeline of Flow Tables can be implemented by using metadata and iteratively searching a single table. Show that any packet processing that can be achieved by a pipeline can also be handled by iterative lookup.

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Problem 3

Read the OpenFlow specification carefully. How would you use OpenFlow to create a conventional IP forwarding table?

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Problem 4

Suppose two researchers who have host computers attached to an OpenFlow switch want to experiment with a nonstandard Layer 3 protocol. What are the possible ways to configure the switch to support the experiment? What are the advantages and disadvantages of each?

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Problem 5

Take the tutorial on the OpenFlow web site and learn how OpenFlow handles ARP.

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01:42

Problem 6

Read the OpenFlow specification carefully. Can a set of controllers be arranged in a hierarchy? If so, what is the reason? If not, why not?

SS
Sarvesh Somasundaram
Numerade Educator
01:37

Problem 7

What is the purpose of the indirect type in a Group Table entry?

Matthew Wagner
Matthew Wagner
Numerade Educator

Problem 8

As a packet travels along an OpenFlow pipeline, each stage in the pipeline can record one or more actions to be taken on the packet or can remove one or more actions that were specified in previous stages. Find an example where removing an action is useful.

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Problem 9

OpenFlow includes a LOCAL action that delivers a packet to the switch's local protocol stack, and a NORMAL action that causes the packet to be forwarded according to the traditional forwarding rules in the switch. If traditional forwarding includes delivery to the switch's stack, why are both actions needed?

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Problem 10

Does Version 1.1 of OpenFlow allow a Flow Table entry to check the Type-Of-Service (TOS) bits in an IP header? Does Version 1.1 allow an action that sets the TOS bits? Explain.

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Problem 11

Consult the Open Networking Foundation web site:
www.opennetworking.org
to find the latest version of the OpenFlow protocol specification. List the most significant new features that have been added.

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