TAILIEUCHUNG - Lab 1.1.4c Configuring Static NAT Addresses

The ISP has allocated a company the public classless interdomain routing (CIDR) IP address . This is equivalent to 30 public IP addresses. Since the company has an internal requirement for more than 30 addresses, the IT manager has decided to use NAT. Addresses – will be reserved for static allocation and – for dynamic allocation. Routing between the ISP and the gateway router will be 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. | Cisco SrsTEMS Lab Configuring Static NAT Addresses 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 to use network address translation NAT to convert internal IP addresses typically private addresses into outside public addresses. Configure static IP mapping to allow outside access to an internal PC. Background Preparation The ISP has allocated a company the public classless interdomain routing CIDR IP address 27. This is equivalent to 30 public IP addresses. Since the company has an internal requirement for more than 30 addresses the IT manager has decided to use NAT. Addresses - will be reserved for static allocation and - for dynamic allocation. Routing between the ISP and the gateway router will be 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. 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 1 - 7 CCNA 4 WAN Technologies v - Lab Copyright 2003 Cisco Systems Inc. 2500 series routers 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 this lab. The configuration output used in this lab is produced from 1721 series routers. Any other router used may .

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