Bufferbloat on FTTN X1

Internet access discussion, including Fusion, FTTN and Gigabit Fiber!
4 posts Page 1 of 1
by whereami » Sat Jul 08, 2017 12:27 am
I just ran a couple of dslreports.com speed tests and I'm getting an "F" for bufferbloat.

Run #1: http://www.dslreports.com/speedtest/18098889
Run #2: http://www.dslreports.com/speedtest/18098934

For #2, I enabled "Hi-Res buffer bloat" and "dodge compression"

Peak latencies during upload are 7500 and 6600 ms respectively for the two runs.

A bit after I had it installed some months ago, I ran dslreports tests and my own tests using Flent, getting similarly terrible results. When I called support, the tech tried to tell me that the level of bloat I was seeing was normal for the product (although, I only recall it being ~2 seconds back then--still ridiculous). I really hope that is not the case, b/c 6 seconds of latency is ridiculous, no matter the network load (packets should be dropped long before 6 seconds). The tech also suggested I post to the forums. I delayed doing so until now.

I can run tests using Flent/RRUL and MTR as I've done in the past if it will help.
by dherr » Mon Jul 10, 2017 8:42 am
Have you ever seen your upload to be above 1Mbit?

It seems odd that you get the normal download speed for FTTN X1 but the upload is well below the normal 2Mbit.

You might want to post your Pace router stats. I have the 5031NV-030 which is showing...

Settings / Broadband / Status / DSL Details

User Rate 32219 kbs 5047 kbs
Max User Rate 53680 kbs 11958 kbs
Noise Margin 16.8 dB 19.0 dB
Attenuation 13.1 dB 13.8 dB
Output Power 14.5 dBm -10.0 dBm
Protocol G.993.2_8d
Channel Interleaved
DSLAM Vendor Information Country {46336} Vendor {BDCM} Specific {42222 }
Rate Cap 53054 kbs
Attenuation @ 300kHz 5.7 dB
Required Impulse Noise Protection 0
VCXO Frequency Offset -7.8 ppm Ok
Excessive Impulse Noise 0 Ok
by whereami » Sun Jul 16, 2017 8:50 pm
That's true, I was surprised that it was only 1MB/s up too, since that's about the same as I was getting on my older Fusion service.

I have a Pace 5268AC. Looks like my sync'd rate is identical to yours.

Type Down Up
User Rate 32219 kbs 5047 kbs
Max User Rate 53591 kbs 10057 kbs
Noise Margin 16.5 dB 14.6 dB
Attenuation 8.0 dB 7.9 dB
Output Power 14.5 dBm -20.3 dBm
Protocol G.993.2_8d
Channel Interleaved
DSLAM Vendor Information Country {46336} Vendor {BDCM} Specific {42213 }
Rate Cap 55112 kbs
Attenuation @ 300kHz 3.7 dB
Required Impulse Noise Protection 0
VCXO Frequency Offset 14.8 ppm Ok
Excessive Impulse Noise 0 Ok
by workerONE » Thu Jul 20, 2017 8:16 pm
Hi, Bufferbloat is caused by your router not being able to receive and switch the data fast enough while doing packet state inspections. It can be fixed by firmware updates usually.
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