Orbi RBK753S Issues with always dropping ethernet speeds to 100Mbps

I would not mix CAT versions for cabling. Either use 5e or all 6. 

Possible bad cable as well. 

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n3rdftw wrote:

I've seen several similar posts - but no one seems to have a real fix - 

I have a brand new set of Orbi RBK753S-100NAS from Costco (Orbi RBR-750 set with Firmware Version 3.2.18.1) - but getting lots of ethernet speed issues. 

One set of ultra short CAT 5E ethernet cables works fine - but my nice long cat 6 cable only gets 100Mbps when directed wired into the Orbi. (On occasion - after a reboot, it'll briefly be 1000Mbps but then drop back down to 100Mbps shortly after)

 

This cable gets me 1000Mbps on my old Apple AirPort Extreme and another Nighthawk I tried out. Also, this cable gives my laptop 1000Mbps when it is connected to a gigabit switch downstream of the Orbi as well - indicating there is nothing wrong with this ethernet cable.

 

Reading thru some extra google results seem to show this is a common problem on Orbis - but they never really clarify why this is happening - other than to offer some random suggestion to buy new cables - is there a fix available or do Orbis just have really bad or ridiculously sensitive or error prone ethernet controllers?

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