My original IP address, assigned by DHCP, was lets say "X". Now I called comcast and ordered a new IP address for my second line (since for video game purposes, i must have 2 seperate IP addy's to play at the same time). I turn off my PCs, comcast says Im good to go, and then I turn my PC's back on, with a NetGear switch diverting the network cables out to the computers, however some problems have arisen. First, the original IP address, X, is now the new computer's IP, while the new IP address, Y, goes to the old computer. I need this to be the opposite, yet I cannot figure out how to get the old IP to the old computer, and the new IP to the new computer. Second, the internet connection on both computers has become incredibly slow. I am not sure why this is either. Any help here is much appreciated, thanks!

I am using a NetGear 5 port switch. It is my understanding the a router can take only one IP from the modem and send that one IP out to all PCs, while a switch can take in up to 4 IPs and send each individual IP out automatically. The switch does send "Y" to the new PC and "X" to the old PC (y is like 68.82.5.122 or something, while X is 168.22.2.129 or something). but i cannot, by any rearrangement of cables and resetting and renewing IPs constantly, get "Y" to go to the new PC and "X" to remain in the old PC.

A switch only passes thru what it gets. You will have to contact comcast tech support to get them to associate a particular ip to a nic or switch the nic cards between pcs. Give a person a fish, they eat for a day. Suggest they internet search and they learn a skill for a lifetime.

what you can do with client/server you can't always do with peer to peer. XP alone is peer to peer. Any workstation version is peer to peer when not used with a server OS like W2K/O3 server. For example you can't have roaming profiles with just XP P2P. Give a person a fish, they eat for a day. Suggest they internet search and they learn a skill for a lifetime.

Hi and thanks for the reply. I am having no trouble switching the IP between "X" and "Y" on the old computer, it simply depends which port on the router I plug into. However, on the new PC, no matter what port I plug into, its always the old IP. Even if I open internet connection properties and manually set the IP to the new IP "Y", it refuses to even connect to the internet at that point. Thanks again

Likely your ISP has the IP tied to the MAC address of your NIC.....which is why wanderer suggested swapping NIC's if possible. If not, he also recommended you call your ISP and explain the situation to them and they will be able to change that for you. Take my advice and take wanderer's advice.

My second post belonged on a different post. Wonder how that happened??? It should never matter which lan port on a device you plug into. The lan port has nothing to do with ip assignments. Your ISP on the other hand, does control your ip to nic card association. In one post you say you have a switch and another you say you have a router. They are NOT the same. You have a SWITCH. It does not put out ip addresses but only passes thru what was sent to it in either direction. But with all that a side you still have the same two solutions. Either swap the nic cards [assuming your ISP has coded ip address X with that nic since it always gets it] or call your ISP, explain your issue and get them to correct it. Give a person a fish, they eat for a day. Suggest they internet search and they learn a skill for a lifetime.