The previous sections have covered basic integration of remote access technologies (dial-up, DSL, and cable) into the MPLS VPN environment. This section covers some advanced Cisco IOS features that you can use with remote access and includes the following:
On-demand address pools (ODAPs)
DHCP relay—VPN support
In most dial-up scenarios, the dial-in server supplies an IP address to the dial-in user (or router). You can allocate the IP addresses to PPP sessions by using a variety of methods:
Statically configured using the RADIUS Framed-IP-address attribute.
Local address pools that can be either overlapping or nonoverlapping. Overlapping/nonoverlapping local pools are implemented and ...