I am relatively confident that MRs (that need 802.3at power) normally report they are getting 802.3at power from MX68 PoE ports. However I checked a few MRs this morning, and they are all reporting they are running in low power mode.
Does anyone have an 802.3at MR plugged into an MX68 PoE port not reporting low power mode? If so, what firmware version is your MX68 and your MR?
The last one I looked at:
You can see the PoE mode of the MR in the bottom left-hand corner of the MR dashboard screen.
This may sound stupid , but have you checked that both devices are running and send LLDP packets ? I'm guessing that the MX needs the LLDP packet to know that the MR is requesting 802.3at power. That could be a bug.
I had the same "problem". Support told me to factory reset the MX and after that my MR52 was running normal. Much later it switched again to low power mode but I replaced the MX68 with a MX75 and there this problem does not show up.