Chapter 4. Design Considerations for Advanced WAN Services

This chapter discusses how advanced WAN technologies based on Layer 1 optical transport or Layer 2 and Layer 3 services can impact the enterprise design. Metro Ethernet, Virtual Private LAN Service (VPLS), and Multiprotocol Label Switching (MPLS) virtual private network (VPN) technologies are considered. Customer requirements and service level agreements (SLA) as a function of a WAN design are also discussed.

Constructing WANs Using Optical Technologies

Figure 4-1 Optical Interconnection Technologies


A number of common optical interconnection technologies are used to connect enterprise ...

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