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Comparing, Designing, and Deploying VPNs by Mark Lewis, - CCIE No. 6280

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Chapter 2. Designing and Deploying L2TPv3-Based Layer 2 VPNs

Layer 2 VPNs (L2VPN) can be used to provide site-to-site Layer 2 connectivity. As discussed in Chapter 1, “What Is a Virtual Private Network?” L2VPNs can be built using technologies and protocols such as the Layer Two Tunneling Protocol version 3 (L2TPv3, RFC3931) and Any Transport over MPLS (AToM) and can fall into three categories:

  • Virtual Private Wire Service (VPWS)—This type of L2VPN provides point-to-point MAN or WAN transport for Layer 2 protocols and connections such as Ethernet, High-Level Data Link Control (HDLC), PPP, Frame Relay, and ATM.

  • Virtual Private LAN Service (VPLS)—A VPLS provides multipoint Ethernet connectivity.

  • IP-only Private LAN Service (IPLS)—This is a newer ...

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