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MPLS and VPN Architectures, CCIP™ Edition by Jim CCIE #2069 Guichard, Ivan CCIE #1354 Pepelnjak

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Chapter 4. Running Frame-mode MPLS Across Switched WAN Media

This chapter includes the following topics:

The previous two chapters showed that you can deploy MPLS using different modes of operation. Chapter 2, “Frame-mode MPLS Operation,” details how MPLS operates across framed interfaces, and Chapter 3, “Cell-mode MPLS Operation,” shows how MPLS operates natively across ATM media.

The Layer 2 infrastructure, which provides the media over which Frame-mode MPLS can operate, often can be supplied through the use of switched WAN technology, such as Frame Relay or ATM. You can run MPLS in Cell-mode across ATM but not when using Frame Relay or when the ATM structure ...

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