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You may want to circle back to this example once you’ve finished all the examples for the chapter. PT does diverge from real gear in this case, because the configuration enables NAT without PAT, but the show ip nat translation command lists port numbers, which it should only do if you had configured NAT with PAT. That should generate enough traffic to cause the command output to look more similar to the output in the example. To generate similar traffic in PT, use PC1, choose the web browser app instead of the command prompt, and browse to address 170.1.1.1 (the server in the Internet.) Then reload the page a few times. The book shows the effects of using Telnet. The example shows output after a user has generated traffic. The example begins with dynamic NAT pre-configured per Example 10-2. The configuration does generally follow what real routers allow, but take care to look at the per-example notes below, trust the book’s examples for device-realistic output (taken from real Cisco devices), and be a bit skeptical of NAT show commands in PT. For instance, the show ip nat translations command – useful to build an understanding of what NAT does – shows data as if you had configured NAT w/ PAT – even if you do not configure NAT. Interestingly, Cisco Packet Tracer’s NAT-related show commands show incorrect output with the more basic features. The chapter takes a pretty straightforward approach, adding a little more detail with each more advanced feature. The chapter moves from the basic options through more detailed: from static NAT, to dynamic 1:1 NAT, and then to Port Address Translation (PAT), which provides a 65536:1 ratio of private:public addresses used. 200-301 V2 Ch16: Controller-Based NetworksĬhapter 10 of the CCNA 200-301 Official Cert Guide, Volume 2 discusses concepts and configuration related to Network Address Translation (NAT).200-301 V2 Part 4: Network Architectures.200-301 V2 Ch12: Miscellaneous IP Services.200-301 V2 Ch05: Securing Network Devices.
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200-301 V2 Ch04: Security Architectures.200-301 V1 Ch25: Configure IPv6 Routing.200-301 V1 Ch24: Configure IPv6 Addressing.200-301 V1 Ch18: Troubleshooting Routing.200-301 V1 Ch16: Router Addresses and Routes.200-301 V1 Ch14: Analyzing IPv4 Subnets.200-301 V1 Ch12: Classful IPv4 Networks.