Following Hyun's lead I am also looking for information concerning CISCO ISO version 12.0 (5). At present we are running Version 11.3(8)DB1 on our Cisco 6400. We are using this equipment for our DSL deployment. Due to some implementation issues we need to try a more recent version of software to see if it will eliminate a high CPU utilization which causes a us to reset the blade. Unfortunately we do not have a long testing period, if any, and would appreciate any information you can send our way. Feel free to reply to my directly or to the list. Kim Graham Network Analyst kgraham@ican.net