Chapter 6. Understanding Any Transport over MPLS

This chapter covers the following topics:

Label Distribution Protocol (LDP)

AToM operations

To provide Layer 2 VPN services over an IP/Multiprotocol Label Switching (MPLS) network infrastructure, the Internet Engineering Task Force (IETF) developed a series of solution and protocol specifications for various Layer 2 VPN applications, including pseudowire emulation. Based on the pseudowire emulation specifications, Any Transport over MPLS (AToM) is implemented as part of the Cisco Unified VPN Suite Solution. The Cisco solution also includes alternative pseudowire emulation using Layer 2 Tunnel Protocol Version 3 (L2TPv3). Chapter 3, “Layer 2 VPN Architectures,” outlines the benefits and implications ...

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