when release, renew my ip it always stays the same. Why, and how do i change it?

Question

Why does it always stay the same, and how do I change to a different one. I have windows xp, and i am connected through a router.

Answer 1

Most DHCP servers use the client's MAC address to keep track of the IP address which is allocated to a device. In other words, if your broadband router and/or modem's MAC address is 00-11-22-ab-cd-ef, when the device connected to your broadband either is powered on (and requests an IP address) or senses a renewal interval and requests a renewal of its IP address lease, it will send out that MAC address to the DHCP server and the DHCP server will provide the same IP address as before.

A few ways in which this doesn't occur are: 1) the server is somehow configured not to do this (unlikely), 2) your MAC address changes - it usual requires new hardware, or 3) the IP address you were allocated in the past was used for some other host because of a shortage of IP address available for the DHCP server to hand out and the record of your old MAC address was overwritten by someone else's lease.

Simply put, the short term means by which to do this is to change MAC addresses for the outwardly facing interface of your broadband device.

Answer 2

first if you are connected directly to a cable or dsl modem, it puts out the same ip address continuously. they may change it once a month or two or three.
If you have a router, you have set the lowest ip address and the maximum numbers. it will always give you the lowest available ip. If you just want another number, reprogram the router to a different range of numbers.