I have these same ISSUES many devices on my Network, Wired and Wireless. Soon as i have HOPPER, it all has issues (Hopper takes over other devices IP addresses) I need to find a fix for this..
I am cross posting from another thread on the web (THIS SITE wont let me post the URL)
my POST...
I too am having DHCP and IP Conflicts. Hopper is to blame for all my issues.
I have 3 macs for example on my network. Some connected Ethernet some Wifi,. Hopper is connected by Ethernet too. Along with xbox 360, OUYA, Google TV, and more.
what happens is.. suddenly my mac computers will pop up saying "Another device on the network is using your computer’s IP address" and boots my MAC computer off.
The mac address of the IP conflict lead to one of 3 mac addresses so far of the Hopper.
I cant resolve the issue yet.
I set as many of my Devices, Computers, Xbox 360, Ouya, Google TV, Imac, mac power book, imac G5, macmini, etc, Win machines all on STATIC IP addresses.
Then i also set my Cable Gateway Router (Motorola SBG6580) to only hand out DHCP from like 192.168.1.3 - 192.168.1.30 and left the rest of the IP as NON DHCP.
that seems to not fix.
when my Mac computer says "Another device on the network is using your computer’s IP address" (which i had my Mac compute set to 192.168.1.70) i would go into network prefs and change my Static IP to 192.168.1.71 or 72 or 73. any my GOD
soon as i do, the IP conflict keeps saying "Another device on the network is using your computer’s IP address" no matter what i put in . then i need to unplug HOPPER Ethernet, or power cycle Router. then it always comes back.
I am experimenting with my ROUTERS option to RESERVE IP's
but i tried that and been having mixed results.
in my routers config... if i simply RESERVE mac address to IP address and name it "iMac" i would assume the IP would never be taken by any other device.
i will TRY again, for earlier it didnt seem to work.
HELP.
I am thinking of completely turning off DHCP, but i think some devices NEED it.