said by Unclepaul :
Just as an FYI, you do not need to waste your time power cycling your modems. The boot files are exactly the same. The node when instructed properly will deliver the upgraded speed automatically. No new configuration in the modem itself.
This is true for the most part but maybe not depending on the local system. And the "node" has nothing to do with it, it's the CMTS that controls this. And how could it hurt anyway ? How much time does it really waste ?