as I wrote in a last posting I should update a system with redundant SUP2 and MSFC FROM CAT OS to IOS. This is a cat 6509 with redundant sup2
My questions right now: For my understand the secondary SUP is inactive while updating the first one . But how did the secondary SUP know about the new system ? Is there any communication between the primary and secondary SUP while updating ?
And also I would like to hold the CAT OS with the working config on the secondary SUP if I need in a case of a update crash to change back !!