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#11
I posted this before in another thread a few months back and will repeat it here since it's applicable.
Originally here: Dynamic IP's
In your particular case, it's the MAC address of the router which would need to change and you cannot simply just install another network card into the router. You might be able to spoof the MAC address to something else...but depending upon your ISP..this may or may not work.Ok, quick lesson on DHCP for you.
When you first turn on your computer, it broadcasts for a DHCP address. When the DHCP server gets the request, it only sees the MAC address (Physical Address) and records the MAC address and assigns a DHCP address to it.
That DHCP address is given for a certain lease time. Let's say it's 4 days. So, 5 hours later, you reboot the computer, it broadcasts again for an address and the server notices that it gave the address of 192.168.1.64 previously to this MAC address. Since it hasn't given that address out to anybody else yet, it simply reassigns it back to the client.
At the 50% lease mark (2 days in my example), the computer will automatically try to renew that lease. If successfull, the computer will renew it again for 4 more days.
So, lets say that you turn off your computer for 5 days. Well, in the course of 5 days, the lease on your computer would expire. However, if the DHCP server doesn't give that address to another machine...then your machine will get that same address again for another 4 days.
So, the best way to get a new address is to get a different MAC address. And the best way to do that is to install a new network card into your computer.
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