Packet Tracer – Verifying and Troubleshooting NAT Configurations
Contents
1. as needed Part 2 Troubleshoot NAT Configuration Step 1 View the NAT translations on R2 If NAT is working there should be table entries Step 2 Show the running configuration of R2 The NAT inside port should align with the private address while the NAT outside port should align with the public address Step 3 Correct the Interfaces Assign the ip nat inside and ip nat outside commands to the correct ports Step 4 Ping Server1 from PC1 PC2 L1 L2 and R2 Record the success of each ping Ping any other machines as needed Step 5 View the NAT translations on R2 If NAT is working there should be table entries Step 6 Show Access list 101 on R2 The wildcard mask should encompass both the 10 4 10 0 network and the 10 4 11 0 network Step 7 Correct the Access list Delete access list 101 and replace it with a similar list that is also one statement in length The only difference should be the wildcard Part 3 Verify Connectivity Step 1 Verify connectivity to Server Record the success of each ping All hosts should be able to ping Server1 R1 and R2 Troubleshoot if the pings are not successful Step 2 View the NAT translations on R2 NAT should display many table entries 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 2 of 22. otfuctde CISCO Cisco Networking Academy Mind Wide Open eee Packet Tracer Verifying and Troubleshooting NAT Configurations Topology 10 4 11 0 24 209 165 76 192 27 3S 4 ais Ri R EEN 10 4 1 0 30 Internet Serveri 64 100 201 0 24 a PCI PC 10 4 10 0 24 Addressing Table Device Interface IP Address Subnet Mask Default Gateway G0 0 10 4 10 254 255 255 255 0 N A R1 G0 1 10 4 11 254 255 255 255 0 N A S0 0 1 10 4 1 2 255 255 255 252 N A S0 0 0 209 165 76 194 255 255 255 224 N A S0 0 1 10 4 1 1 255 255 255 252 N A Server1 NIC 64 100 201 5 255 255 255 0 64 100 201 1 PC1 NIC 10 4 10 1 255 255 255 0 10 4 10 254 PC2 NIC 10 4 10 2 255 255 255 0 10 4 10 254 L1 NIC 10 4 11 1 255 255 255 0 10 4 11 254 L2 NIC 10 4 11 2 255 255 255 0 10 4 11 254 Objectives Part 1 Isolate Problems Part 2 Troubleshoot NAT Configuration Part 3 Verify Connectivity 2013 Cisco and or its affiliates All rights reserved This document is Cisco Public Page 1 of 2 Packet Tracer Verifying and Troubleshooting NAT Configurations Scenario A contractor restored an old configuration to a new router running NAT But the network has changed and a new subnet was added after the old configuration was backed up It is your job to get the network working again Part 1 Isolate Problems Ping Server from PC1 PC2 L1 L2 and R2 Record the success of each ping Ping any other machines
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