It's important to consider certain things when upgrading to a newer device. 
 
- Rack Space
- power [ AC/ DC  / socket type ( C14/C15 - C19/C20 etc) 
- Rack type and mounting brackets and screws
- IOS  Feature comparison  does all the features supported in the newer image - double check [ sometime we downgrade the device eg: move the powerful device where most needed]
- Access to the technicians 
- Interface Type and fibre patch cords [ lc / sc / fc ] , length. 
- If we are moving the device from a different location, ensure that it is properly transported and wrapped in appropriate cartons before proceeding with the migration plan. 
 
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