What Is MAC Cloning?
To clarify, MAC stands for Media Access Control and the hardware address is what the device (or Network Interface Card) is manufactured with. Why clone a MAC address? Computer/Device connectivity issues happen even with the hardware and software working properly and MAC cloning used to fix this. Adding a different computer/device (like a router) that has its own MAC address, issues may arise with connectivity.
Connectivity issues arise primarily due to the addition of external new MAC address into the network. MAC cloning fixes this issue. To clarify, simply cloning the MAC address that the ISP has used for assigning IP addresses, this solves the connectivity issue.
Provided that it has the capability, MAC cloning solely done at the router. Most ISPs assign their IPs based on the MAC address in your equipment. If the MAC address of your router is 00-11-22-33-44-55 and you connect to your ISP. Moreover, the DHCP server records your MAC and assigns an IP. If you disconnect from the ISP, you lose your IP address. Therefore, the next time you connect, the DHCP server sees your MAC. It also looks to see if it has assigned an IP address to you before.
Above all, if it has assigned an IP and the lease time has not expired. It will most likely give you the same IP address you had before disconnecting. New MAC address most likely equals new IP. How to clone your MAC and if your router has this feature is dependent on the router itself. You’ll need to find the instructions on the manufacturer’s website. Check out our Router Support page to get started.
Basically, if you tell your router to clone your network card's MAC Address. It makes your ISP think that you're still using the same computer/network card/device to access their services, and therefore they allow your router on the network.
How to Change Your IP Address - Change your IP address in Windows 2000, XP, 2003, and Vista, using command prompt
What Is DHCP Relating to ISP or Router? - Dynamic Host Configuration Protocol (DHCP) determines if your IP is static or dynamic and the length of time an IP address is assigned.