I have a Redhat Linux 8.0 installed with 2 interface card. This masquarade eth1 address(192.168.20.) to a live ip eth0. Every thing is working fine with nearly 100 computers in the background using this the address. But my Hubs & Switchs are showing collision. Is it anything to do with the Linux (or any other problem)if so please help me how I can get rid of this problem as it has reduced the network speed.