So I check my download speed every few days to make sure I get what I am paying for, Samknows real speed would usually come back with around 1140 and 940 - Ookla would come back with around 940Mbps too. During all this the upload is a constand 52Mbps.
Noticed things going slow on Sunday and the speeds had dropped to around 94Mbps download.
I have two different 1Gb network cards in the PC and swiitching between those (and SH4 ports) made no difference.
After a couple of power resets of the PC and Hub4 all went back to the expected rates. I suispected the PC had got intob a weird state.
During yesterday I could tell from download speeds that things were not right again - and they were back to 94Mbs download and 52Mbps upload.
Tried the power resets again and still 94Mbps download via Ethenet. 5GHz Wifi is still working at over 300-400Mpbs which has never changed.
I have another device with a 1Gb card which would give similar speed results to those excepted - but that is now maxing at 94Mbps download too. A few other devices would usually achieve over 130Mpbs - and are all maxing at 94Mpbs too.
One device I could always get around 300Mbs download via Ethernet is now showing 94Mbps too - but still 300Mbs when switched to Wifi.
It seems the SH4 is auto-negotiating at 100 and not 1000 on all four ports. Config still shows 1 DOCSIS 3.1 channel connect and config download is still 1230000450.
Have done a pinhole factory reset and before doing any SH4 customisation I tried again and still only 94Mpbs on all four ports.
I am sure it is not a signal issue as Wifi is good and I'm getting between -1.1 and +3.0 on all power levels and between 37.3 and 38.8 on all SNR.
I've not seen anything in the logs to show a firmware update but the logs were lost here in the factory reset - currently cmreg-vmdg640-bbt076+voc-b.cm
I will call TS today and get them to suggest things but I can put the issue down to the SH4.
Power levels are mainly the same after the factory reset so within expected range.
Anyone any other ideas of things to try?
MOD EDIT: see message 109 for an update
1.2Gb/55Mb in Oxford (area 31) using SH5