Cisco CISCO876-SEC-I-K9 Configuration Guide - Page 57

Chapter 4 Configuring PPP over ATM with NAT Configuration Example Command Step 10 exit Purpose Exits configuration mode for the ATM interface. Example: Router(config-if)# exit Router(config)# Step 11 access-list access-list-number {deny | permit} source [source-wildcard] Example: Router(config)# access-list 1 permit 192.168.1.0 255.255.255.0 Defines a standard access list permitting addresses that need translation. Note All other addresses are implicitly denied. Note If you want to use NAT with a virtual-template interface, you must configure a loopback interface. See Chapter 1, "Basic Router Configuration," for information on configuring the loopback interface. For complete information on 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 a client in the PPPoA 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 Commands marked by "(default)" are generated automatically when you run the show running-config command. ! interface Vlan1 ip address 192.168.1.1 255.255.255.0 ip nat inside ip virtual-reassembly (default) ! interface ATM0 no ip address ip nat outside ip virtual-reassembly no atm ilmi-keepalive pvc 8/35 encapsulation aal5mux ppp dialer dialer pool-member 1 ! dsl operating-mode auto ! OL-5332-01 Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide 4-11