I was looking to get some info,opinions advise on configurations and software versions that work best with this addressing scheme IPv6. I'm running Cisco uBR7246vxr and a 2811 in front. I've been attempting to use NAT/PAT with one public IP. I will have a max of 250 cm's. Also I'm looking for a newer version IOS for the uBR, besides Cisco is there anywhere I can aquire this.