I need your help with a problem with the PowerExpand Elite 13-in-1 Thunderbolt 3 Dock. There is a MacBook Pro 13 (2019) running macOS 11.1 (Big Sur) connected via USB-C to the 85W port of the docking station . Whenever the docking station goes into standby (green LED), the local network (LAN) is massively disrupted for some time afterwards: all devices on the LAN are then unreachable. The network only becomes free again when the docking station is brought out of standby (blue LED) or turned off.
The problem has already been reproduced with two devices of mine. Anker is aware of the problem, a solution has not been found yet.
What happens: on another system on the LAN, a command line is started with “ping 126.96.36.199” or "ping ". The Macbook connected to the Docking Station is put into standby. The Docking Station will also put itself into standby (green LED) after about 30 seconds. Within a variable period of time (30 seconds to 5 minutes) the ping on the second system reports “Request timeout”. This behavior can be fixed as soon as the standby of the MacBook or the docking station is interrupted.
So far, Anker could only “prove” to me the proper function and installation of the Realtek 2.5Gbe drivers under Catalina (where KEXT drivers were still accepted).
My request to you: can you try to reproduce the problem under Big Sur and kindly confirm me if the problem also occurs with other docking stations and under other environments (my guess is that only Big Sur must be installed)?
What I have noticed so far:
- Problem occurs 30 seconds to 5 minutes after the LED changes from blue to green (docking station standby).
- The MacBook must be connected to one of the rear ports
- The USB-C port used on the Macbook does not matter
- The Mackbook can be put into standby manually
- The behavior was reproduced with different network cables
- The behavior was reproduced with different routers
- The behavior was reproduced with another Anker 13-in-1 docking station
- The behavior could not be reduced with another (passive) docking station (identical procedure)
- The time to the “Request timeout” varies a lot
- The “Request timeout” behavior can be aborted by exiting standby, unplugging the network cable or unplugging the USB-C cable from the Macbook
- The behavior also occurs when the network devices are set to inactive (turned off) in the network profile (but the system is theoretically offline as a result)
- The behavior, on the other hand, does not occur if the network environment on the Macbook is previously adjusted so that there are no network devices in the profile (system is thus technically offline) - however, there is then the other problem that the docking station does not recognize that the Macbook is in standby and then does not switch itself to standby either. WTF?!
- The support wants me to install Realtek 2.5Gbe network drivers manually. But these are currently only available as KEXT and Big Sur accepts only DEXT - but unfortunately the support doesn’t understand that
- For me the driver “System/Library/DriverExtensions/com.apple.DriverKit.AppleUserECM.dext” (USB 10/100/1000 LAN) is installed and activated by default.
- so I suspect that the docking station seems to be incompatible under Big Sur?!