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MPLS Fundamentals by Luc De Ghein - CCIE No. 1897

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Chapter 4. Label Distribution Protocol

What You Will Learn

By the end of this chapter, you should know and be able to explain the following:

  • The need for LDP

  • The operation of LDP

  • Specific Cisco IOS LDP features

In addition, this chapter gives you an overview of the Cisco IOS LDP commands and how to use them. Some examples are given to better illustrate the use of these commands.

The fundamental story on MPLS is that packets are labeled, and each label switching router (LSR) must perform label swapping to forward the packet. This means that in all cases, labels need to be distributed. You can achieve this in two ways: piggyback the labels on an existing routing protocol, or develop a new protocol to do just that. If you want to adjust the Interior ...

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