The routing protocols do not run the routers. In this network diagram router 4 can ping router 5 (172.16.6.5) but not router 7 (172.16.11.7): Review in detail what happens to the packet and verify that routers have the correct routing information to move the packet along. Use the show and debug commands to verify that the translation occurs. Verify that correct translations exist in the translation table. For information on NAT configuration see, Configuring Network Address Translation: Getting Started. To determine if the problem is in the NAT operations:īased on the configuration, clearly define what NAT is supposed to achieve.You can determine that there is a problem with the configuration. Outside Network Devices Cannot Communicate with Inside Routers.Can Ping One Router but not Another Router.This document troubleshoots these problems: Conventionsįor more information on document conventions, refer to the Cisco Technical Tips Conventions. If your network is live, ensure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. This document is not restricted to specific software and hardware versions. There are no specific requirements for this document. This document describes how to troubleshoot IP connectivity problems in a NAT environment.
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