一个INSIDE口 多个OUTSIDE口的NAT配置
Feature History
Release Modification
12.2(4)T
This feature was introduced.
12.2(4)T2
Support for the Cisco 7500 series routers was added.
This document describes the NAT—Ability to Use Route Maps with Static Translations feature. It includes the following sections:
Feature Overview
Supported Platforms
Supported Standards, MIBs, and RFCs
Configuration Tasks
Configuration Examples
Command Reference
Feature Overview
Previous to this feature, route mapping was supported only with dynamic Network Address Translation (NAT) translation.
The NAT—Ability to Use Route Maps with Static Translations feature enables NAT multihoming capability with static address translations. Multihomed internal networks now can host common services such as the Internet and Domain Name System (DNS), which are accessed from different outside networks.
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Note Network static support is not included in this feature.
Benefits
The ability to configure route map statements provides the option of using IP Security (IPSec) with NAT.
Translation decisions can be made based on the destination IP address when static translation entries are used.
Related Documents
Cisco IOS IP Command Reference, Volume 1 of 3: Addressing and Services, Release 12.2
Cisco IOS IP Configuration Guide, Release 12.2
Supported Platforms
Cisco 2500 series
Cisco 2600 series
Cisco 3620 router
Cisco 3640 router
Cisco 3660 router
Cisco 7100 series
Cisco 7200 series
Cisco 7500 series
Determining Platform Support Through Feature Navigator
Cisco IOS software is packaged in feature sets that support specific platforms. To get updated information regarding platform support for this feature, access Feature Navigator. Feature Navigator dynamically updates the list of supported platforms as new platform support is added for the feature.
Feature Navigator is a web-based tool that enables you to quickly determine which Cisco IOS software images support a specific set of features and which features are supported in a specific Cisco IOS image.
To access Feature Navigator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions at http://www.cisco.com/register.
Feature Navigator is updated when major Cisco IOS software releases and technology releases occur. As of May 2001, Feature Navigator supports M, T, E, S, and ST releases. You can access Feature Navigator at the following URL:
http://www.cisco.com/go/fn
Supported Standards, MIBs, and RFCs
Standards
No new or modified standards are supported by this feature.
MIBs
No new or modified MIBs are supported by this feature.
To obtain lists of supported MIBs by platform and Cisco IOS release, and to download MIB modules, go to the Cisco MIB website on Cisco.com at the following URL:
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml
RFCs
No new or modified RFCs are supported by this feature.
Configuration Tasks
See the following sections for configuration tasks for the NAT—Ability to Use Route Maps with Static Translations feature. Each task in the list is identified as either required or optional:
Enabling Static NAT Route Mapping (required)
Verifying Static NAT Route Mapping (optional)
Enabling Static NAT Route Mapping
To enable route mapping with static NAT configurations, use the following command in global configuration mode:
Command Purpose
Router(config)# ip nat inside source {list {access-list-number | access-list-name} pool pool-name [overload] | static local-ip global-ip route-map map-name} Enables route mapping with static NAT translation configured on the NAT inside interface.
Verifying Static NAT Route Mapping
To verify the static NAT route mapping configuration, use the following command in privileged EXEC mode:
Command Purpose
Router# show ip nat translations [verbose] Displays active NAT translations.
Configuration Examples
This section provides the following configuration example:
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