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Multiprotocol Label Switching

Sample Chapter is provided courtesy of Cisco Press.
Date: Jun 25, 2008.

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Chapter Information

Chapter Description

This chapter introduces the core concepts with MPLS, particularly its use for unicast IP forwarding and for MPLS VPNs.

From the Book

CCIE Routing and Switching Exam Certification Guide, 3rd Edition

$89.99

Foundation Topics

MPLS defines protocols that create a different paradigm for how routers forward packets. Instead of forwarding packets based on the packets' destination IP address, MPLS defines how routers can forward packets based on an MPLS label. By disassociating the forwarding decision from the destination IP address, MPLS allows forwarding decisions based on other factors, such as traffic engineering, QoS requirements, and the privacy requirements for multiple customers connected to the same MPLS network, while still considering the traditional information learned using routing protocols.

MPLS includes a wide variety of applications, with each application considering one or more of the possible factors that influence the MPLS forwarding decisions. For the purposes of the CCIE Routing and Switching written exam, this book covers two such applications in the first two major sections of this chapter:

MPLS unicast IP
MPLS VPNs

This chapter ends with a brief introduction to many of the other MPLS applications. Also, as usual, please take the time to check http://www.ciscopress.com/title/9781587201967 for the latest version of Appendix C, "CCIE Routing and Switching Exam Updates," to find out if you should read further about any of the MPLS topics.

3. MPLS Unicast IP Forwarding | Next Section Previous Section

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