Hi All, My 6509 has dual Supervisor Engines and dual MSFC cards. It runs in Hyrid mode. I plan to upgrade the IOS of the MSFC cards only, NOT the Supervisor Engines. I wonder: 1. Is IOS version of MSFC dependent on the CATOS version of Supervisor Engine? 2. When I reset after the upgrade, do I have to reset the whole module (Supervisor Engine + MSFC) or just the MSFC? If I cannot reset only the MSFC, in what mode should I issue the reset command? CATOS or IOS in this case (IOS is in session 15 or 16)? Will this reset both the Supervisor and the MSFC? 3. Should I not losing the configuration which I assumed they're saved in NVRAM of the MSFC or Sup. Engine? Again, Thanks much to All!!! Thomas N. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=18138&t=18138 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]