In Chapter 2, “Designing and Deploying L2TPv3-Based Layer 2 VPNs (L2VPN),” you saw how Layer Two Tunneling Protocol version 3 (L2TPv3) can be used to transport a number of Layer 2 protocols in a site-to-site configuration. This chapter shows how L2TPv2 (RFC2661) and L2TPv3 (RFC3931) can be used to provide home workers, telecommuters, or “road warriors” with access to a corporate or other organization network.
Figure 8-1 depicts L2TP remote access VPNs.
Figure 8-1. L2TP Remote Access VPNs
L2TP can be used to provide remote access in two different ways: