Hmm, well this is a bit of a puzzle. The Downstream and Upstream power levels are all within the specified ranges as is the Signal To Noise Ratio and yet you have a lot of Post-RS errors when on a healthy connection there should be none. All I can think of is you may have an intermittent fault and as we all know those can be a Bleep to track down.
I'm afraid all I can suggest is checking your cable connections at the back of the hub and at the wall socket to make sure they are secure.
I've checked all the connections and they are all tight and secure. Thank you for your help and for taking the time to look into the problem for me.
All the best
Just to check the RS errors, these may be historical build up. Can you reboot the router and then check they have reset to 0 and then check every hour or so whether they are building up. Also, do you have any powerlines or ethernet switches in the loop? Do you get dropouts or is it just a speed issue?
-------------------- John --------------------
My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.
I rebooted the Hub but the logs didn't disappear. I tried to 'refresh data' but that did not remove them either so I do not know how to remove the Network Logs.
I will try and keep an eye on it and I will try and note the time I have issues to compare.
I have no powerlines but I do have a network switch. It is a Netgear GS116Ev2. I can log into it but most of the info doesn't mean much to me. It does say there are 0 CRC error packets on any port if that is any help.
The issue I have is I can be happily watching a streaming Video (on Youtube or Twitch say) then the video will buffer for a fair amount of time (I'd say about 20s to 1 minute although I will try timing it now). Sometimes in Twitch the video will buffer but the text chat will continue meaning that when the Video resumes they are quite out of sync.