My roommate and I are experiencing a problem in that our computers have the same IP address. I have a laptop and he's got a desktop, and only recently did this occur, in the past day or two.
Is there a way to reset our ip addresses? What can we do?
This may be a silly question but...
Are you referring to INTERNAL or EXTERNAL IP address? I don't see it mentioned anywhere else here, but you will 100% of the time have the SAME EXTERNAL IP if you are on the same router. What indication did you have that you are on the same IP address?
Just to rule out a basic misconfiguration, go to the command prompt and type
ipconfig /renew
if this doesn't fix it then, go to Network Connections (Vista/7 go to Network and sharing Center
then click Change adapter settings
on the left or in XP, go to Control Panel
> Network Connections
).
Now, right click on the adapter you are using and find 'Internet Protocol Version 4 (TCP/IPv4)`.
Make sure automatic is set for at least the top one and your alternate configuration, unless you have a reason to have it manually set.
If there is a reason you need a manual address (Such as no DHCP source), consider simply changing the last number in the IP to something that no other device is using.
From the command prompt type
ipconfig /release
followed by
ipconfig /renew
If that doesn't work, check that you don't have a manually set ip address on one of the machines
You may also be running into an issue where only 1 ip address is given for a port. If you're on a campus, the administrator may be limiting the number of IP addresses used. If you're on a broadband connect, make sure you're using a router with NAT and DHCP and not just a hub.
If you are using a router, it may have partially died on you.
Ok, I'm assuming you're using NAT and DHCP on some cheap home router. This is VERY VERY common on these devices. There are two surefire fixes. One is to statically assign them addresses using the router (see router manual to configure static addresses based on MAC address) or you can statically assign IP addresses within the DHCP range in the computers themselves.
ipconfig /release and /renew will usually not work without clearing the ARP cache out, and this is often times not an option through the GUI on home routers.
auto
. If using Windows 7, run the Network Troubleshooter.