Just in case it's of any interest...or even use!
specs for R710 say...
- 8W (minimum)
- 11W (typical)
- 25W (peak, includes full USB load)
- 12.95W (peak in 802.3af mode)
I have a Netgear GS752TP running R500s (max power 10.5W so don't need "at") using both "at" and "af" POE ports.
I didn't require anything beyond default settings.
Running latest firmware for switch (184.108.40.206).