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Author Topic: The TBB Broadband Quality Monitor (BQM) .. is it reliable?  (Read 349 times)

snadge

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The TBB Broadband Quality Monitor (BQM) .. is it reliable?
« on: February 06, 2019, 06:30:02 PM »

I recall being curious about this years ago...but never finding an answer,

ThinkBroadband's BQM - is it reliable? I ask because when I used it some years ago there would be zero packet loss, but as soon as I put the modem under any stress/use, BQM would start registering 'some' packet loss as the modem wouldn't reply if it were very busy...


Thanks in advance
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Zyxel VMG8924-B10A <-> PlusNET <-> Eci DSLAM
Sync: 79,000k <-> Atten: 14.2db <-> Snr: 6dB <-> Mode: FastPath

j0hn

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Re: The TBB Broadband Quality Monitor (BQM) .. is it reliable?
« Reply #1 on: February 06, 2019, 06:34:51 PM »

I find it extremely reliable.

Some modems will deliberately drop ICMP pings when under heavy load, which would show as packet loss on a BQM.

It's not something I've ever had with my Asus.
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Plusnet FTTC 80/20 -  ECI now Huawei cab
retx low @ 3dB target SNRM
Zyxel VMG1312-B10A bridged with 1508 MTU + Asus RT-AC68U running Asuswrt-Merlin

Alex Atkin UK

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Re: The TBB Broadband Quality Monitor (BQM) .. is it reliable?
« Reply #2 on: February 28, 2019, 05:54:43 PM »

I'd also suspect that bufferbloat once under load will cause the BQM to timeout, thus reporting it as packet loss.

Its definitely more pessimistic than real-world usage as I see packet loss spikes on BQM when nothing is reported at my end.  I even have ICMP prioritised on my router but still the spikes remain.

You can see the differences today where I had a lot of VPN traffic:
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Modems: 2 x VMG3925-B10B V5.13(AAVF.12)C0-jumbo
Router: i5-7200U appliance running pfSense.
ISP: Zen Unlimited Fibre 2 + Plusnet Unlimited Fibre Extra.