Cisco 520-T1 Software Guide - Page 42
Example:, ip nat pool, netmask, prefix-length, ip nat inside source, interface, overload, ip nat
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Configure Network Address Translation Chapter 3 Configuring PPP over Ethernet with NAT Perform these steps to configure the outside Fast Ethernet WAN interface with dynamic NAT, beginning in global configuration mode: Step 1 Command ip nat pool name start-ip end-ip {netmask netmask | prefix-length prefix-length} Purpose Creates pool of global IP addresses for NAT. Example: Router(config)# ip nat pool pool1 192.168.1.0 192.168.2.0 netmask 255.255.252.0 Router(config)# Step 2 Step 3 ip nat inside source {list access-list-number} {interface type number | pool name} [overload] Example 1: Router(config)# ip nat inside source list 1 interface dialer 0 overload or Example 2: Router(config)# ip nat inside source list acl1 pool pool1 interface type number Example: Router(config)# interface vlan 1 Router(config-if)# Enables dynamic translation of addresses on the inside interface. The first example shows the addresses permitted by the access list 1 to be translated to one of the addresses specified in the dialer interface 0. The second example shows the addresses permitted by access list acl1 to be translated to one of the addresses specified in the NAT pool pool1. For details about this command and additional parameters that can be set, as well as information about enabling static translation, see the Cisco IOS IP Command Reference, Volume 1 of 4: Addressing and Services. Enters configuration mode for the VLAN (on which the Fast Ethernet LAN interfaces [FE0-FE3] reside) to be the inside interface for NAT. Step 4 ip nat {inside | outside} Example: Router(config-if)# ip nat inside Router(config-if)# Step 5 no shutdown Example: Router(config-if)# no shutdown Router(config-if)# Identifies the specified VLAN interface as the NAT inside interface. For details about this command and additional parameters that can be set, as well as information about enabling static translation, see the Cisco IOS IP Command Reference, Volume 1 of 4: Addressing and Services. Enables the configuration changes just made to the Ethernet interface. Cisco Secure Router 520 Series Software Configuration Guide 3-6 OL-14210-01