Thanks for your heartful reply! Think u will help me a lot many times. :) Well another simple question are here 1. Difference between 'reset' and 'reload' command! 2. In uBR 924, there are some led and DSNR is one of them. Is it Digital Signal to Noise Ratio? When checking SNR in IOS, the smaller numbers (including minus figures) are the better performancer than bigger ones? 3. When uBR 924 couldn't give IPs to the connected LANs (not because boot problems but somewhat problems unknown), someone said this as 'Ranging problem'. Is it correct? 4. When you use 'show stac'? Wow....I think I am getting better because of you all. Thanks for letting me asking on! Have a nice day! _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]