Hello colleagues, this might be an 4open door4 question: I have two Cat5509s, and I am in the process of installing a redundant supervisor engine into both. The first one works fine, since the Supervisor engines are exactly the same, including the firmware version. On the other Cat5500, the newly inserted Supervisor doesn4t go into the 4standby4 status. The difference between the currently active Supervisor and the redundant one is that the firmware version on the redundant one is 5.x.x, while on the active one it is 4.x.x. In addition, the currently active one says 1000BaseLX Supervisor, while the one I inserted is a Supervisor III. Does anybody know if there is a compatibility matrix for this ? Thanks in advance for your help. Regards, Hans _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=16420&t=16420 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]