Cisco Systems OL-6426-02 Benutzerhandbuch

Network Address Translation (NAT) translates packets from addresses that match a standard access list, 
using global addresses allocated by the dialer interface. Packets that enter the router through the inside 
interface, packets sourced from the router, or both are checked against the access list for possible address 
translation. You can configure NAT for either static or dynamic address translations.

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

ip nat pool name start-ip end-ip {netmask 
netmask | prefix-length prefix-length}

Router(config)# ip nat pool pool1 

Router(config)# 

Creates pool of global IP addresses for NAT. 

ip nat inside source {list access-list-number} 
{interface type number | pool name} [overload]

Router(config)# ip nat inside source list 1 

or

Router(config)# ip nat inside source list 

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 

interface type number

Router(config)# interface vlan 1

Router(config-if)# 

Enters configuration mode for the VLAN (on 
which the Fast Ethernet LAN interfaces reside) to 
be the inside interface for NAT.

ip nat {inside | outside}

Router(config-if)# ip nat inside

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