4.9. STUDY QUESTIONS

  1. Discuss the restrictions on the TE-class mappings on a deployment transitioning from TE to DiffServ-TE, when the LSPs in the TE deployment have setup and hold priorities of 2 and 3.

  2. A customer is contemplating a DiffServ-TE deployment where eight CTs are used. Which bandwidth model is better suited for such a deployment?

  3. One of the challenges of incrementally deploying DiffServ-TE in a network where TE is already deployed is the risk that the path computation will yield paths traversing nodes that do not yet support the new CTs, thus causing the path signaling to fail. Explore some of the techniques that can be used to avoid this problem.

  4. What could be some of the reasons why some implementations require consistent configuration of the bandwidth constraint model on all links?

  5. A network is deploying voice and data services. Overbooking by a factor of 3 is desired for data traffic, but no overbooking is desired for voice traffic. Describe how this could be used using (a) LSP-size overbooking or (b) local overbooking multipliers and compare the two approaches.

  6. LSP policing is a powerful tool not just for keeping traffic within its reservation bounds, but also for accounting purposes. Give an example where LSP policing can provide per-destination billing, while simple accounting on either the incoming or outgoing interface couldn't.

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