tailieunhanh - Lab 1.1.5 Verifying NAT and PAT Configuration

The ISP has allocated a company the public CIDR IP address . This is equivalent to 4 public IP addresses. Since the company has an internal requirement for more than 30 addresses, the IT manager has decided to use NAT with PAT. Routing between the ISP and the gateway router is done using a static route between the ISP and the gateway, and a default route between the gateway and the ISP. The ISP connection to the Internet will be represented by a loopback address on the ISP router. | Cisco SrsTEMS Lab Verifying NAT and PAT Configuration Router 1 Router 2 Router 2 DTE cisco Straight-through cable Serial cable Console rollover Crossover cable ISP class Router 1 DCE 30 NA class cisco 30 32 Gateway 24 Router Router FastEthernet Interface Serial 0 Designation Name 0 Address type Address Subnet Mask Loopback 0 Enable Address Secret Subnet mask Password Enable VTY Console passwords Objective Configure a router for Network Address Translation NAT and Port Address Translation PAT Test the configuration and verify NAT PAT statistics Background Preparation The ISP has allocated a company the public CIDR IP address 30. This is equivalent to 4 public IP addresses. Since the company has an internal requirement for more than 30 addresses the IT manager has decided to use NAT with PAT. Routing between the ISP and the gateway router is done using a static route between the ISP and the gateway and a default route between the gateway and the ISP. The ISP connection to the Internet will be represented by a loopback address on the ISP router. Cable a network similar to the one in the diagram above. Any router that meets the interface requirements displayed on the above diagram may be used. This includes the following and any of their possible combinations 800 series routers 1600 series routers 1700 series routers 2500 series routers 1 - 7 CCNA 4 WAN Technologies v - Lab Copyright 2003 Cisco Systems Inc. 2600 series routers Please refer to the chart at the end of the lab to correctly identify the interface identifiers to be used based on the equipment in the lab. The configuration output used in this lab is produced from 1721 series routers. Any other router used may produce slightly different output. Conduct the following steps on each router unless specifically instructed otherwise. Start a HyperTerminal session as performed in the Establishing a HyperTerminal session lab. Note Refer to the .

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