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Switch(firmware)# upgrade 192.168.1.100 managed.bk
Switch(firmware)# show
Active Image
------------
Image : managed
Version : GEPoEL2-ESW28KX (standalone) v1.13
Date : 2011-12-08T11:37:00+08:00
Alternate Image
---------------
Image : managed.bk
Version : GEPoEL2-ESW28KX (standalone) v1.14
Date : 2011-12-21T10:41:33+08:00
Switch(firmware)#
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