alright, so i'm running snow leopard i have a wnr2000 netgear wireless n router and a late 2008 macbook pro. ever so often i get a self assigned ip error and when i shut the modem off and back on again things are jolly until it happens again. i tried renewing the DHCP under the settings but that doesn't work, any input is appreciated.
Does your router use dynamic IP's for computers? if so then another computer on the network could be using static IP's which will through off your dynamically assigned one. However if your router is set up to use static IP's then check none of them conflict or that none of the other computers are using a static IP that will conflict with yours. Finally try setting a static IP high up the range (something like 192.168.x.250) and see if that helps.