Cisco Systems OL-6426-02 manual Configuration Example

Chapter 3 Configuring PPP over Ethernet with NAT

Configuration Example

For complete information on the NAT commands, see the Cisco IOS Release 12.3 documentation set. For more general information on NAT concepts, see Appendix B, “Concepts.”

Configuration Example

The following configuration example shows a portion of the configuration file for the PPPoE scenario described in this chapter.

The VLAN interface has an IP address of 192.168.1.1 with a subnet mask of 255.255.255.0. NAT is configured for inside and outside.

Note Since the VLAN interface is on LAN, we have used a private IP address.

Note Commands marked by “(default)” are generated automatically when you run the show running-configcommand.

!

vpdn enable vpdn-group 1 request-dialin protocol pppoe

!

interface vlan 1

ip address 192.168.1.1 255.255.255.0 no ip directed-broadcast (default) ip nat inside

!

interface FastEthernet 0

ip address 192.1.12.2 255.255.255.0 no ip directed-broadcast (default) ip nat outside

!

interface dialer 1

ip address negotiated

pppauthentication chap dialer pool 1 dialer-group 1

!

dialer-list 1 protocol ip permit

ip nat inside source list 1 interface dialer 1 overload ip classless (default)

ip route 10.10.25.2 0.255.255.255 dialer 1

!

Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide

OL-6426-02 3-9