Device speed import

Device speed import

I have 120 interfaces being monitored by NetFlow analyser.  Each interface is a WAN connection that has an individual capped bandwidth.  Is there a shortcut way to specify the bandwidth of each interface, to save me from doing it through the GUI? 
 
Over time I will be adjusting the bandwidth allocations across our system, so would like a streamline way of exporting/importing the interface parameters to save me a lot of manual clicking. 
 
Thanks!

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