I just set up my router and I'm trying to connect to RealFlight on a windows machine to another machine (Mac M1Pro) which requires a reliable high-speed connection. The ping speeds vary widely from excellent to horrible and back again, it seems to be good for about 10 seconds then horrible for about 4 or 5 seconds and then good again .. and around in circles.

 

The poor performance corresponds to ping speeds going up to 100 or sometimes even 250ms. Here's an example of ping from the Mac to the router which is about 2 m away in the corner of the same room.

 

64 bytes from 192.168.0.1: icmp_seq=223 ttl=64 time=2.307 ms

64 bytes from 192.168.0.1: icmp_seq=224 ttl=64 time=1.770 ms

64 bytes from 192.168.0.1: icmp_seq=225 ttl=64 time=108.158 ms

64 bytes from 192.168.0.1: icmp_seq=226 ttl=64 time=2.012 ms

64 bytes from 192.168.0.1: icmp_seq=227 ttl=64 time=121.754 ms

64 bytes from 192.168.0.1: icmp_seq=228 ttl=64 time=2.673 ms

64 bytes from 192.168.0.1: icmp_seq=229 ttl=64 time=64.901 ms

64 bytes from 192.168.0.1: icmp_seq=230 ttl=64 time=112.017 ms

64 bytes from 192.168.0.1: icmp_seq=231 ttl=64 time=2.101 ms

64 bytes from 192.168.0.1: icmp_seq=232 ttl=64 time=1.896 ms

64 bytes from 192.168.0.1: icmp_seq=233 ttl=64 time=1.860 ms

64 bytes from 192.168.0.1: icmp_seq=234 ttl=64 time=3.477 ms

64 bytes from 192.168.0.1: icmp_seq=235 ttl=64 time=2.133 ms

64 bytes from 192.168.0.1: icmp_seq=236 ttl=64 time=2.876 ms

64 bytes from 192.168.0.1: icmp_seq=237 ttl=64 time=1.975 ms

64 bytes from 192.168.0.1: icmp_seq=238 ttl=64 time=4.783 ms

64 bytes from 192.168.0.1: icmp_seq=239 ttl=64 time=83.911 ms

64 bytes from 192.168.0.1: icmp_seq=240 ttl=64 time=129.663 ms

64 bytes from 192.168.0.1: icmp_seq=241 ttl=64 time=21.650 ms

64 bytes from 192.168.0.1: icmp_seq=242 ttl=64 time=2.432 ms

64 bytes from 192.168.0.1: icmp_seq=243 ttl=64 time=2.231 ms

64 bytes from 192.168.0.1: icmp_seq=244 ttl=64 time=30.894 ms

64 bytes from 192.168.0.1: icmp_seq=245 ttl=64 time=74.278 ms

64 bytes from 192.168.0.1: icmp_seq=246 ttl=64 time=41.789 ms

64 bytes from 192.168.0.1: icmp_seq=247 ttl=64 time=2.073 ms

64 bytes from 192.168.0.1: icmp_seq=248 ttl=64 time=1.448 ms

64 bytes from 192.168.0.1: icmp_seq=249 ttl=64 time=2.923 ms

 

I have tried all the suggestions I've found here including:

Disabling QoS

Disabling Parental Controls

Selecting 80Mhz Channel width

 

Any other suggestions?