How to do Stacking Role from NONE to Backup
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X250e-48p and x250e-48t  Stacking.  I want to achieve Master and Backup Stack Topology. Please advice me how to configure it. Thanks.

Slot-1 Stack.1 # show stackingStack Topology is a Ring
Active Topology is a Ring
Node MAC Address    Slot  Stack State     
Role      Flags
------------------              ----     -----------        -------       ---
*00:04:96:28:22:1b      1         Active          Master       CA-
 00:04:96:26:64:a9       2        Active          
     CA-
* - Indicates this node
Flags:  (C) Candidate for this active topology, (A) Active Node
        (O) node may be in Other active topology
Slot-1 Stack.2 #
Slot-1 Stack.2 # sh stack configurationStack MAC in use: 02:04:96:28:22:1b
Node               Slot         Alternate          Alternate
MAC Address        Cfg Cur Prio Mgmt IP / Mask     Gateway         Flags     Lic
------------------ --- --- ---- ------------------ --------------- --------- ---
*00:04:96:28:22:1b 1   1   100  
                       CcEeMm--- Ee
 00:04:96:26:64:a9 2   2   50                          CcEeMm--- Ee
* - Indicates this node
Slot-1 Stack.5 # sh stack stack-ports
Stack Topology is a Ring
Slot Port Select Node MAC Address  Port State  Flags Speed
---- ---- ------ ----------------- ----------- ----- -----
*1   1    Native 00:04:96:28:22:1b Operational C-      10G
*1   2    Native 00:04:96:28:22:1b Operational CB      10G
 2   1    Native 00:04:96:26:64:a9 Operational CB      10G
 2   2    Native 00:04:96:26:64:a9 Operational C-      10G
* - Indicates this node
Flags:  (C) Control path is active, (B) Port is Blocked
Slot-1 Stack.5 #
- Paul