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Posted

Hi all

 

I hope someone can help as this is driving me crazy. I have got a Telstra smart modem 3 on 250/25 mbs plan

modem firmware

21.4.0500

DomaOS version 

3.3.688

My modem test gets great under load upload and download ping tests but when i do a buffer bloat test from mc pc the download is good but upload is bad over 100. I tried a direct connection to my nbn modem and i dont get the high upload and get a A+ score but thru the modem not matter what i do to internet optimiser it stays above 100ms. I have played with upload and downlaod sliders from 70% up and down. Set my computer to a computer a playstation a game console. Added pc to priority traffic with all ports and set to default. On the odd occasion i think i get it and i get a A with very low upload latency but then i run the buffer test again and boom back to 100+ms. Again remove modem go direct to nbn modem and low upload latency ping. Not sure why the modem can test under 25ms down and up or its benchmark test but my pc cant get good upload ping.

Screenshot 2025-03-31 192026.png

Screenshot 2025-03-31 191919.png

  • Administrators
Posted

It'll just be a case of fine tuning the percentage for upload - as your upload speed is a lot lower it is easier to saturate and for bufferbloat to occur so you may need to be more or less agressive with the percentage for it

Posted

Yes I have tried the sliders starting at 70 going up and down by 5% and testing. Tried from 50% up to 100^ for upload and nothing seems to help.

  • Administrators
Posted

I'd suggest following this guide https://support.netduma.com/en/support/solutions/articles/16000074717-how-to-test-your-internet-ping while downloading/streaming etc and start with a high value for Congestion Control (set to Always), say 95% then check, decrease by 10%, check, decrease by 10% etc, until you get to a value that is pretty good and then try 5% either side of that value to see if it can be improved. It's important to note that Download & Upload on Congestion Control don't have to be the same value and that you may have a better experience with differing values. This will be a more real world test.

Posted

Yes have tried this and download can be great 4ms latency but upload stays at 100+. I start from 100% and have tested every 5% under it and it does not budge. Can this be a NBN issue

 

Posted
15 hours ago, Netduma Fraser said:

Are you using PPPoE/VLAN or IPv6 at all?

No pretty standard 

  • Administrators
Posted

Are you actually experiencing any issues with the upload at all? It may just be due to being a slower upload the test reports high bufferbloat regardless 

Posted

No real upload issues. I just can’t figure out how to get it consistently lower. For some reason I can get random A scores with very lower bloat but mostly it sits over 100ms

  • Administrators
Posted

If you're not encountering any issues with it then you're chasing numbers on a test that wouldn't translate into a better performance for you. However you have it set for upload now will be fine 

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