firstly thank you for your respond.
for your info, there are several Linux PCs which is one of PC will act as a router and the rest as a hosts..each PC will have two interfaces.
1. i want to know how to configure that PC to become as a router in IPv6 network..as i know, i just need to add another NIC and configure it, after configure it, i will connect to switch/hub to make all PCs connected..is it correct?
2. I want something with an easily configurable web-interface.