Originally Posted by bendsley

setup your routers like cyn said.

Router 1: 192.168.1.0
Router 2: 192.168.2.0
Router 3: 192.168.3.0 and so on

If both routers are set to 192.168.1.0 then of course you're going to have collisions. Since you're being able to ping for a few seconds, thats the CSMA/CD protocol kicking in.

Carrier Sense Multiple Access/Collision Detect is the protocol for carrier transmission access in Ethernet networks. On Ethernet, any device can try to send a frame at any time. Each device senses whether the line is idle and therefore available to be used. If it is, the device begins to transmit its first frame. If another device has tried to send at the same time, a collision is said to occur and the frames are discarded. Each device then waits a random amount of time and retries until successful in getting its transmission sent.

CSMA/CD is specified in the IEEE 802.3 standard.