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Practical Exercise 12-2: Combining Dynamic and Static NAT
In some situations, you might be required to combine dynamic NAT with static NAT. Before starting this Practical Exercise, you need to remember a few things. When you work with dynamic NAT, a translation does not exist in the NAT table until your router receives traffic that requires translation. A dynamic translation has a timeout period after which it is purged from your router's translation table. A static NAT translation exists in your router's NAT translation table as soon as you configure the static NAT command. It remains in the translation table until you delete the entry.
You will continue to use the topology outlined in Figure 12-5 for this Practical Exercise. The first task in merging dynamic and static NAT is to configure R4 so that outside devices address the Loopback 0 interface, 10.10.7.7, as 192.168.48.250. You will also configure a dynamic address pool of ten addresses starting at 192.168.48.200 for use in dynamic translation of R4's Ethernet segment.
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