I don't fully understand internet settings very much but my two-pennyworth is this.
I have been with VM cable for about 10 years and in which time my IP has only changed about 3 or possibly 4 times, I also turn off my router sometimes for days on end and also for 2 weeks a couple of times a year when I go away on holiday and it has never effected my IP address.
Although it has just changed again as I have also just upgraded to a SuperHub WiFi Modem Router.
(But that is to be expected)
As for a static IP address, then surely the IP of 192.168.0.1 from your PC equipment to your router is all that is required.
From there you can then open up alternative address such as 192.160.1.112 etc.
Although I know a couple of CCTV sites that require a static address or else we lose the connection to the cameras/multiplexor.
The issue isn't about static or dynamic ip's per se, it's about changing DNS addresses in VM Superhub. (see 1st post) Under dynamic the DNS servers provided are VM's own and are 'locked in', therefore unchangeable. If I change to static ip, I
can choose whatever DNS addresses I want but the settings won't last long before denial of service.
Setting DNS servers in Linux Mint 12, which I'm told
should override those in the router, don't, and are refreshed on every boot/disconnect back to those of the router!
All I want is to use the DNS servers
I want and not those I'm forced to