Hi Sadaf,

-> First thing you forgot to mention what OS is running on machine
  on which you want to enable IPV6 router.

-> If it is GNU/LINUX machine then you have to install RADVD (Router advertising daemon) on that and configure and you have to setup a v6 tunnel on that machine so that it can route v6 request to outside(in case your other two machine has v6 address and you are trying to browse some v6 enable site ). In Lan you configure the static route on gnu/linux box which is acting as router using "route" command or "ip" command.

I think this will help you a bit to configure IPV6 router .


Vikram