Hi All, 

I seem to be having an odd issue I cannot seem to get to the bottom of. I've had a very unstable internet since 26/03/2024 morning which was causing constant Citrix drops outs in periods of a few hours, this is backed up by broadband monitor I forgot I had running of intermittent spikes and packet losses. Prior to this date it has been rock solid. 

I went investigating and nothing would suggest there is any issue with the router, the logs didn't have anything of interest on them to my eyes at the time as if it was picking up any errors. I wasn't catching any lights changing to amber, the lights on the ONT all stayed the same and as it currently stands Vodafone is adamant there is nothing wrong on their end. Did a speed test did a speed test out of curiosity on ookla and that came back around the 600/600 mark repeatedly which isn't the full 900/900 I pay for but I can accept losses in the network somewhere thinking maybe power cables are causing interference so I moved the Ethernet out on its own, no change in the test results.

I then connected up the Vodafone router (THD3000) and did the same speed test with the exact same Ethernet cables just to confirm my assumptions to be surprised with it managing the 900/900 that the AX73 could not. 

So far I have;

• Checked what happened between 25th and the 26th, nothing from what I can tell. 
• Checked the router settings, I have a Static IP correctly set up and the AX73 is set to 1000mps full duplex.
• Changed DNS servers which have made no difference. 
• Turning off the wifi and repeating speed test thinking it might be overloaded, no difference. 
• Removing other wired connections on the AX73, no difference. This matches the state of the Vodafone router test. 
• Changed the cable from the ONT to the Router to a shielded type just in case the AX73 couldn't deal with a similar lever of interference, no change. 

I am a relatively techy person but networking isn't something I've dabbled with much and I'm at a bit of a loss as to what would be causing drop in speed let alone the instability. It almost feels reminiscent to the Intel Puma issue that the Virgin routers had a while back where they weren't quite fit for purpose to a more infrequent but more drastic degree.

I appreciate the speed issue is very much a first world problem and could have been there form the start but now that I've noticed it I want to get to the bottom of it. The instability on the other hand ruins any ability to work through Citrix VDI. 

Graphs for context. 

Any Ideas?