Quote:Really? So in the middle of a game of BF2 the IP suddenly changes and you are disconnected? I have a hard time believing that. Or is it only if you have NO open connections?

DHCP knows nothing about open connections. If your ISP has decided to re-number your IP block, or change routing, or whatever, at some specific point in time, they will not let their DHCP server renew leases for longer than that cut-off time. At that point, your IP lease is expired, and may no longer route to you; you will have to acquire a new IP address.

In practice, this happens seldom, unless you turn off your computer or firewall. But it's certainly part of the DHCP protocol capabilities, and an hypothetical ISP that wanted to physically prevent servers on their network could force it to happen, say, every midnight. Again, in reality, this is a large hassle, and most of the time, you'll keep renewing and keeping your current IP, at least until power off.