Chapter Summary and Review

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In this chapter, we saw that one of several protocols can be used to dynamically program switches in order to build and implement cross-connect tables. We compared and contrasted various aspects of those protocols and examined the tradeoffs in each.

Knowledge Review 

Answer the following questions in the spaces provided.

1. What does a cross-connect table allow a router to do?

2. What are the two methods used to load cross-connect tables?

3. Within the ordered control mode of label distribution, two primary methods are used to trigger the distribution of labels. What are these two methods?

4. What is the component of an MPLS network that creates cross-connect tables?

Answers: 1. Process packets with incoming labels; 2. independent control and ordered control; 3. downstream unsolicited (DOU) and downstream on demand (DOD); 4. label switch router (LSR).

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