Before upgrading ExtremeXOS on a switch, it is highly recommended that you create a backup copy of the configuration. Creating a copy of the "Config Booted" configuration file, with the version number of the ExtremeXOS image included in the name of the backup copy, is the simplest method.
To do this:
# show switch
SysName:          XXXXX
SysLocation:
SysContact:       support@extremenetworks.com, +1 888 257 3000
System MAC:       00:04:96:51:FE:E2
System Type:      XXXXXX
SysHealth check:  Enabled (Normal)
Recovery Mode:    All
System Watchdog:  Enabled 
Current Time:     Thu Sep  4 00:57:18 2014
Timezone:         [Auto DST Disabled] GMT Offset: 0 minutes, name is UTC.
Boot Time:        Wed Sep  3 20:07:11 2014
Boot Count:       402
Next Reboot:      None scheduled
System UpTime:    4 hours 50 minutes 7 seconds 
Current State:    OPERATIONAL
Image Selected:   primary
Image Booted:     primary
Primary ver:      15.7.1.4
Secondary ver:    15.7.1.5 
Config Selected:  ssh-privatekey.cfg
Config Booted:    ssh-privatekey.cfg 
                  ssh-privatekey.cfg Created by ExtremeXOS version 15.7.1.5                  
            219131 bytes saved on Mon Jul 14 23:03:08 2014
                For example: cp ssh-privatekey.cfg ssh-privatekey-15_7_1_5
For more information about ExtremeXOS configuration files, see Configuration Changes.