Chapter 7. Implementing Network-Based Access VPNs Without MPLS

In this chapter, you learn about the following topics:

  • Introduction to Virtual Routers

  • Implementing Virtual Routing with Cisco IOS

  • Using Tunnels to Build Network-Based IP VPN

  • Using GRE for IP VPN

  • Using IPSec for IP VPN

  • Routing Between VRF-Lite PEs

Up to this point in the book, only MPLS has been offered as a way to run network-based VPN services from provider edge (as opposed to customer premises) routers. However, not all networks in the world run MPLS. The IPSec and GRE VPNs discussed in Chapter 3, “VPNs in Broadband Networks,” are all initiated from the customer premises. (Thus, they are CPE VPNs according to the taxonomy.) Using CPE VPNs is a perfectly valid and heavily deployed solution, ...

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