Cisco Systems C819GUK9, C819HG4GVK9 manual 11-8

Chapter 11 Configuring PPP over Ethernet with NAT

Configuration Tasks

DETAILED STEPS

	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	Enables dynamic translation of addresses on the
	access-list-number} {interface type number	inside interface.
	pool name} [overload]	The first example shows the addresses permitted
	Example:	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:	For details about this command and additional
	Router(config)# ip nat inside source list	parameters that can be set, as well as information
		about enabling static translation, see Cisco IOS IP
	acl1 pool pool1
		Command Reference, Volume 1 of 4: Addressing
		and Services.
Step 3
	interface type number	Enters configuration mode for the VLAN (on
	Example:	which the Fast Ethernet LAN interfaces
		[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
	Example:	NAT inside interface.
		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 Cisco IOS IP
		Command Reference, Volume 1 of 4: Addressing
		and Services.
Step 5
	no shutdown	Enables the configuration changes just made to the
	Example:	Ethernet interface.
	Router(config-if)# no shutdown
	Router(config-if)#
Step 6
	exit	Exits configuration mode for the Fast Ethernet
	Example:	interface.
	Router(config-if)# exit
	Router(config)#

	Cisco 819 Series Integrated Services Routers Software Configuration Guide
11-8	OL-23590-02