ADSL speed woes

[rusyn]

For about a week now, I have been having noticeable browsing and download issues, particularly for international sites. At one time, MyBroadband wouldn't load.

tl;dr - ADSL sync's at 5Mbps. Ping and Youtube are fine, browsing is slow, international horrendous; several ISPs tested. On Honeydew exchange.


Help?



All running on a D-Link DSL-2750U, non-Telkom branded, and has been for several years.

Basics:
Line is a 4Mbps but syncs at 5Mbps.
ISP is Vox 150GB Fatpipe, but have tested with prepaid & free accounts from Afrihost and Webafrica, respectively.
Broadbandstats has me on Honeydew - http://www.broadbandstats.co.za/exchange/RHDW
May or may not be of import, Huawei laid fibre along the telephone poles around 2 or 3 weeks ago.

The issue presents as sluggish browsing speed, yet happy speed tests and Youtube:
www.speedtest.net - page load ~8s, result 1.76Mbps down / 0.37Mbps up (http://www.speedtest.net/my-result/5260992899)
speedtest.mybroadband.co.za - page load ~3s, result 3.42Mbps down, 0.46Mbps up (http://netgauge.ookla.com/share/439801690.png)
http://capetown.spdtst.saix.net/ (to Rosebank), result 3.90Mbps down, 0.45Mbps up.
Youtube - https://www.youtube.com/watch?v=0OFXL0jIMR4 - is streaming at 3000Kbps.

Facebook's landing page loads fine. Browsing to groups, however, sometimes just never gets there.
Reddit is ok - one can see images rendering late - but imgur.com is painful (http://i.imgur.com/VEZAfP5.jpg, 130KB, took 3.5s).
NuGet packages are not exempt - ballpark 4 minutes to update PostSharp (4.33MB).
Downloads would have tickled 450KB/s before, now cap around 200KB/s.
Popping into a SSH tunnel doesn't help either.
Vox's account overview shows me as unshaped.

I've had the port recreated (did nothing) and have opened a support ticket with Telkom, which is in progress. The Vox support ticket, whilst prompt, didn't really help; basically, the line statistics were reviewed. In fairness, I did agree to waiting for Telkom's response as they indicated it may be the exchange.

Apparently interleaving is on (stats below) at 96 downstream, 1 upstream. Couldn't tell you when that was enabled.


Some more stats:

ADSL info:

adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    8000
Last initialization procedure status:   0
Max:    Upstream rate = 1024 Kbps, Downstream rate = 10512 Kbps
Bearer: 0, Upstream rate = 508 Kbps, Downstream rate = 5119 Kbps

Link Power State:       L0
Mode:                   ADSL2+
TPS-TC:                 ATM Mode
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        15.4            26.6
Attn(dB):        42.0            23.2
Pwr(dBm):        0.0             12.9

                        ADSL2 framing
                        Bearer 0
MSGc:           71              10
B:              44              72
M:              1               1
T:              3               1
R:              16              0
S:              0.2792          4.5271
L:              1748            129
D:              96              1

Afrihost (direct PPPOE):
http://testmy.net/8kMnaX3KC.png

Tracing route to mybroadband.co.za [104.20.72.110]
over a maximum of 30 hops:

  1     *        *        *     Request timed out.
  2     *        *        *     Request timed out.
  3     *        *       21 ms  169.1.5.30
  4    20 ms    19 ms    20 ms  169.1.5.56
  5    19 ms    21 ms    21 ms  196.46.25.157
  6    49 ms    47 ms     *     41.66.181.63
  7    20 ms    19 ms    19 ms  104.20.72.110

Vox (router):
http://testmy.net/ja0u9kt6e.png

Tracing route to mybroadband.co.za [104.20.72.110]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  10.0.0.2
  2     *        *        *     Request timed out.
  3     *      143 ms    22 ms  41.193.164.85
  4    22 ms    31 ms    31 ms  41.193.164.86
  5    39 ms    23 ms    24 ms  41.193.164.92
  6    39 ms    25 ms    22 ms  196.46.25.157
  7    31 ms    86 ms    84 ms  41.66.181.63
  8    28 ms    35 ms    34 ms  104.20.72.110

Webafrica (router):
http://testmy.net/CJoT2wYuk.png

Tracing route to mybroadband.co.za [104.20.72.110]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  10.0.0.2
  2     *        *        *     Request timed out.
  3    39 ms    51 ms    43 ms  196.38.73.134
  4    22 ms    25 ms    19 ms  196.38.73.133
  5    91 ms    23 ms    20 ms  196.38.73.17
  6    21 ms    38 ms    57 ms  196.26.0.63
  7   114 ms    24 ms    77 ms  168.209.1.139
  8    47 ms    51 ms    42 ms  168.209.100.102
  9    57 ms    58 ms    40 ms  168.209.6.10
 10    69 ms    82 ms    36 ms  196.36.84.154
 11    84 ms   101 ms    59 ms  41.84.13.228
 12   138 ms    54 ms   218 ms  41.66.181.59
 13    37 ms   121 ms    36 ms  104.20.72.110

 

[¯\_(ツ)_/¯]

I've got the exact same mix as you, 4Mbs, Telkom ADSL, Vox. But remote from you towards PTA

I've also noticed an issue, but it seemed to have improved with me doing anything. Week before last I was playing with fancy/complex networking and had issues, but some were definitely of my own doing, though some issues were suspicious. Last week there were issues causing me to unplug a section of my net. I checked in on the Vox thread here but saw nothing, so let it slip. Probably because I'm used to international issues floating about (DDoSing, Seacom etc) and giving it a bit of time, saving me a lot of frustration, I never tried diagnosing it and have no stats. So to make any real assertion as to where the bottleneck is would be unfair. The bomb normally explodes suddenly when I really need to do something fast

Typically my degradation is during the day and improves in the evening. But today seemed better. I'll monitor.