@terziyski Thanks, but that does not appear to be the case: 1) both satellites report 1000Mb connection, and 2) if a satellite is connected as just an AP, in the same location and with the same cable, the speed is normal.

Seems to be something specific to the mesh...

  @terziyski Definitely, but in my case everything is wired with CAT6e cabvle (for some future proofing) and tested to be at least 1Gb. Probably could run at higher speeds, too, but I don't have anything faster yet...

  @terziyski For 1Gb it wouldn't, but at some point I will want to upgrade at least the uplink between the office (where cable modem comes in) and the distribution switch in the far closet from where everything runs to the first floor and other rooms upstair to a 10Gb link (and maybe get a 10Gb card for the NAS as well). Length of the run through the attic is enough that it would be pushing it for CAT6, and it did not seem to be worth it putting different cables for different runs, and replacving cables inside wealls is a pain, so I had everything done with 6a, and hopefully I will not have to think about cabling for the next 20 years...

Anyway the point is that connections to satellites are fast enough:

and are tested to provide correct performance in AP mode, but slow down by a factor of ~6.5 when in mesh mode, which seems quite wrong...

  @terziyski Yeah, rebooted everything a few times, dropped and reconnected satellites etc.

I've sent a support request in; since Ethernet backhaul is rather new and often only in Beta firmware, thought I'd check here in case anyone had seen something like that...

  @terziyski Did that, too, although I probably will nreed to run another test on satellites today when i am done working (or staring at eclipse...), it feels better today. Weird.