Chapter 11: Scaling IP Addresses with Network Address Translation

Labs:

11.3.1 Our small company has recently been assigned the network number 206.222.222.0 by ARIN. Previously the company was using a private IP address on the internal network. Now that the company is going to be connected to the Internet, we need to either go to each and every workstation and configure it with a new IP address, or to use some kind of IP address translation at the router. For security reasons our company does not want the computers to be directly on the Internet, using real IP addresses. Since our company only has a limited number of computers, we have decided to use static network address translation. It is our job to configure the ISDN connection and implement the address translation.
11.3.2 Our small company has recently been assigned the network number 206.222.222.0 by ARIN. Previously the company was using a private IP address on the internal network. Now that the company is going to be connected to the Internet, we need to either go to each and every workstation and configure it with a new IP address, or to use some kind of IP address translation at the router. For security reasons our company does not want the computers to be directly on the Internet, using real IP addresses. Since our company has a large number of computers it would be too time consuming to enter all of the static address translations into the router. Our alternative is dynamic network address translation. It is our job to configure the ISDN connection and implement the address translation.
11.3.3 Our quickly growing company has the network number 206.222.222.0, which was assigned by ARIN. Previously the company was using dynamic address translation over an ISDN line however the company has just upgraded the line to Frame Relay. The company has been growing and has outgrown the number of valid IP addresses. The company is not able to get another class C network from ARIN, so we need to find another solution which will allow all of our employees Internet access without over running the available valid IP addresses. We have researched NAT and found that if set up properly we can translate many internal IP addresses into one valid IP address. This is called Overloading Network Address Translation. It is our job to configure the Frame Relay connection and implement the proper address translation. 
11.3.4 Configure a Frame Relay connection between our WebHeads router in Orlando and the ISP's router in Houston, and configure TCP Load Distribution on the WebHeads router.
11.3.5 Configure an ISDN connection between Bread company router and the Butter company router, and configure it so that the two networks which have the same IP addresses can communicate together. To accomplish the communication we will configure dynamic overlapping network address translation.