Upgrading the Software on all Active Nodes
  
    You can centrally upgrade the software on all
      active nodes in a stack. To upgrade all nodes in the stack, all nodes must be running an
      ExtremeXOS release that supports stacking (ExtremeXOS release 12.0 or later).
    
      - 
        Download a new ExtremeXOS software release and install it
          on all nodes on the active topology using the command: download image
          [[hostname | ipaddress] filename {{vr}
          vrname}] {partition}
                
        
           Note    ExtremeXOS offers the ability to synchronize a non-master slot
            from the master individually, but it does not support the upgrade of the entire stack
            with one image download to the master. 
 
- 
        If necessary, use the use image
          {partition} {primary | secondary} command to
          select the image partition (primary or secondary) into which the software was saved. 
      
- 
        Restart all nodes in the new release using reboot
          {[time mon day year hour
          min sec] | cancel} 
        For
          example:
                     
download image [[hostname | ipaddress] filename {{vr} vrname}] {primary | secondary}
use image {partition} [primary | secondary]
reboot
- 
        Before you upgrade a stack, make sure that the active
image partition is same across all nodes. 
        
          To determine the active partition selected on all nodes and the
            ExtremeXOS versions installed in each partition, use the show slot detail
            command. You can install the image only on the alternate image partition and not on the
            active image partition.  
 
- 
        To run the upgraded software, you must reboot the stack
after installation with the image partition that received the software
being selected.
      
- 
        If the active partition is different on some nodes, the
          action you take depends on what is stored in both partitions:
        If both primary and secondary partitions have the
          same ExtremeXOS release, you may use the following commands to cause a node to use the
          same active image as the rest of the stack: 
          use image {primary | secondary} slot slot-number
reboot slot slot-number
 
 If you are using the primary image on your master
          node and some other node primary image does not contain the same  ExtremeXOS version as
          your master node's primary image, you may use the command:  synchronize slot slotid to cause the node to contain the same  ExtremeXOS versions in both partitions as
          it is on the master node, and to reboot the node into the primary partition. Hitless upgrade is not supported in a stack.