I have 1 cable modem which is connected to a linksys wireless router / 4 port switch
my neighbor has a cable modem and a 4 port router/ switch
problem: when we connect our 2 networks together, it goes crazy, all the lights start flashing real fast on all routers, my end and his.
I cannot access the internet but he can, I unplug the connection to his network and everything is fine, when I unlplug his cable modem or mine and we can access each others network fine and the lights blink normally, plug it back in everything goes haywire again????
Any help would be appreciated, TIA.