Cisco Systems 520 series manual Enables dynamic translation of addresses on, Inside interface

Chapter 3 Configuring PPP over Ethernet with NAT

Configure Network Address Translation

Perform these steps to configure the outside Fast Ethernet WAN interface with dynamic NAT, beginning in global configuration mode:

	Command	Purpose
Step 1
	ip nat pool name start-ip end-ip {netmask	Creates pool of global IP addresses for NAT.
	netmask prefix-lengthprefix-length}
	Example:
	Router(config)# ip nat pool pool1
	192.168.1.0 192.168.2.0 netmask
	255.255.252.0
	Router(config)#
Step 2
	ip nat inside source {list access-list-number}	Enables dynamic translation of addresses on the
	{interface type number pool name} [overload]	inside interface.
	Example 1:	The first example shows the addresses permitted
		by the access list 1 to be translated to one of the
	Router(config)# ip nat inside source list 1	addresses specified in the dialer interface 0.
	interface dialer 0 overload	The second example shows the addresses
	or	permitted by access list acl1 to be translated to one
		of the addresses specified in the NAT pool pool1.
	Example 2:	For details about this command and additional
	Router(config)# ip nat inside source list	parameters that can be set, as well as information
	acl1 pool pool1	about enabling static translation, see the
		Cisco IOS IP Command Reference, Volume 1 of 4:
		Addressing and Services.
Step 3
	interface type number	Enters configuration mode for the VLAN (on
		which the Fast Ethernet LAN interfaces
	Example:	[FE0–FE3] reside) to be the inside interface for
	Router(config)# interface vlan 1	NAT.
	Router(config-if)#
Step 4
	ip nat {inside outside}	Identifies the specified VLAN interface as the
		NAT inside interface.
	Example:	For details about this command and additional
	Router(config-if)# ip nat inside	parameters that can be set, as well as information
	Router(config-if)#	about enabling static translation, see the
		Cisco IOS IP Command Reference, Volume 1 of 4:
		Addressing and Services.
Step 5
	no shutdown	Enables the configuration changes just made to the
		Ethernet interface.
	Example:
	Router(config-if)# no shutdown
	Router(config-if)#

Cisco Secure Router 520 Series Software Configuration Guide

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