![]() 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. ![]()
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