Hi there, After updating the software on the stack and reload it, I couldn't see the Switch 2!, furthermore the mode on the other stack is installing mode but here shows me that the mode is BUNDLE as you can see:-  Show version   Switch Ports Model              SW Version        SW Image              Mode ------ ----- -----              ----------        ----------            ---- *    1 56    WS-C3850-48P       16.3.6            CAT3K_CAA-UNIVERSALK9 BUNDLE     and when I typing show switch, its shows me that :-   Switch#   Role    Mac Address     Priority Version  State ------------------------------------------------------------ *1       Active   cc5a.5369.0600     15     V07     Ready 2       Member   0000.0000.0000     0              Provisioned   please if you can give me an advice to solving this issue I'll purser that   Thanks a lot, ... View more