I am chatting with support. Asked for a new ip because I believe mine was being hacked. He said my ip address was 10.x.x.x. I looked it up and it's an unregistered ip address. Bogon they call it. Sho...
the T1 agent cannot give you a new IP address. The way to get a new IP is to change the mac ID of the equipment connected to the modem, or change the router connected to the modem. That, or remove the router from the modem and connect your computer direct for a couple of days, then when you reconnect the router back to the modem, your old address should have been assigned to someone else, meaning you will get a new IP address.
Isn't there a trick where you can deprovision someone's modem, locking it with a 172.x.x.x IP, then re-provision for a new IP address? I know it used to work before but that was when provisioning was local to the CMTS. Now it seems like a modem will work on any node, not just the one it is assigned to.
There is, it means putting the modem/account into AUP/suspension, reboot modem, wait for it to some online with the non routable 172 ip, then take it out of AUP/Suspension, and reboot, that works, "MOST" of the time, not all the time, and T1 won't be able to do that, as well as many of the NEW CAG, (Tier 1 -CAG recent moves), won't know how to do that. Older CAG would know how to do it, but again, it doesn't always work.
You could try bypassing the router and connect a PC direct to the CM1000 modem. You have to power cycle the modem each time you change what it is connected to but that should give the PC a new IP. Not sure you will get the old IP when you reconnect the router though. They may cache it.
As for why it's a hassle, it's probably because Cox doesn't want you changing your IP. One person one time isn't a big deal but imagine it large scale. If everyone was changing their WAN MAC it may cause all kinds of issues. IPv4 is already in such short supply that I am surprised that DHCP rotation isn't shorter. Some people report getting a new IP every month. It's a big reason why DDNS is so popular.