ADSL Throughput testing

Forums › Spark New Zealand (including Skinny and BigPipe) › ADSL Throughput testing - slow upload

Foiler

220 posts

Master Geek

#191570 9-Feb-2016 10:17

I have an ADSL connection in Greenlane which is performing badly, and seems especially slow in the upload direction.

Running a speed test is painfully slow, and appears to stall out on the upload section, but eventually completes.

http://www.spark.co.nz/speedtest reported 35Mbps/0.5Mbps (is that possible for ADSL!!)

speedtest.net reports 1Mbps down, and 0.12 up.

The router is a Mako, so probably ok, and of course have restarted it, so next step is to try a different modem.

Are there any other tests I should be doing? Yes there is a splitter, and yes this ADSL has been performing ok over recent months.

Is it possible the DSLAM is impaired?

Modem stats are as follows:

ADSL Status

----------------------------------

ADSL Line Connected

Line Rates: Receive 17699 kbps Transmit 876 kbps

ADSL Modulation: ADSL2+ (ADSL2+)

Annex Type: AnnexA

ATM Virtual Channel IDs: no connections open

Physical Layer Stats: Local Remote

Noise Margin 15.50 dB 16.5 dB

Attenuation 9.5 dB 1.5 dB

Power 12.3 dB

Driver version - 1.75 (1.75:E.25.41.66 A)

INP: 0.00 up, 2.01 down

Remote Device: BRCM

ATURANSIRev: 5632

ATURANSISTD: 0

ATUCANSIRev: 62883

ATUCANSIId: BRCM

ATUCANSISTD: 0

PeterReader

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Geekzone

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#1487895 9-Feb-2016 10:17

Hello... Our robot found some keywords in your post, so here is an automated reply with some important things to note regarding broadband speeds.

If you are posting regarding DSL speeds please check that

you have reset your modem and router
your PC (or other PCs in your LAN) is not downloading large files when you are testing - you are not being throttled by your ISP due to going over the monthly cap
your tests are always done on an ethernet connection to the router - do not use wireless for testing
you read this topic and follow the instructions there.

Make sure you provide information for other users to help you. If you have not already done it, please EDIT your post and add this now:

Your ISP and plan
Type of connection (ADSL, ADSL2, VDSL)
Your modem DSL stats (do not worry about posting Speedtest, we need sync rate, attenuation and noise margin)
Your general location (or street)
If you are rural or urban
If you know your connection is to an exchange, cabinet or conklin
If your connection is to a ULL or wholesale service
If you have done an isolation test as per the link above

Most of the problems with speed are likely to be related to internal wiring issues. Read this discussion to find out more about this. Your ISP is not intentionally slowing you down today (unless you are on a managed plan). Also if this is the school holidays it's likely you will notice slower than usual speed due to more users online.

A master splitter is required for VDSL2 and in most cases will improve speeds on DSL connections. Regular disconnections can be a monitored alarm or a set top box trying to connect. If there's an alarm connected to your line even if you don't have an alarm contract it may still try to connect so it's worth checking.

I recommend you read these two blog posts:

I am the Geekzone Robot and I am here to help. I am from the Internet. I do not interact. Do not expect other replies from me.

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sidefx

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#1487943 9-Feb-2016 11:03

Have you tried disconnecting everything else before testing? I assume you are testing wired not wifi?

Syncing at 17/1 but speedtest only giving 1/0.1 sounds a bit like something may be saturating the connection (anyone seeding any "linux isos" torrents? :) ) but will also depend on which speedtest server you're testing to.

The bots advice above it pretty good for what to check...

Odd that the spark speedtest would give that result though.

"I was born not knowing and have had only a little time to change that here and there." | Octopus Energy | Sharesies
- Richard Feynman

sbiddle

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Biddle Corp

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#1487975 9-Feb-2016 11:30

First guess would be upstream saturation at your end.

Foiler

220 posts

Master Geek

#1509833 9-Mar-2016 13:05

Thanks Steve and I agree that was the most likely cause .. however, when we looked at the traffic usage the inference from the logs was that there was nothing untoward.

Just to let you know that we finally got a replacement Mako router from Secureme and this cured the problem.

We were monitoring the download times for a Google page, shown below. The impairment was noticed from 7 Feb until midday 23 Feb and when the modem was changed.

Packet losses followed a similar pattern:

Talkiet

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#1509870 9-Mar-2016 13:44

The google page you were monitoring was very likely affected by a known fault outside New Zealand... We had that remedied on/about the 23rd.

Try speedtest.net and specifically select the Spark NZ speedtest servers. (This is NOT the same as using the speedtest linked on the Spark website)

Cheers - N

Please note all comments are from my own brain and don't necessarily represent the position or opinions of my employer, previous employers, colleagues, friends or pets.

Foiler

220 posts

Master Geek

#1509907 9-Mar-2016 14:33

Maybe a coincidence if the dates do match up?

Yes the webpage download times were measured for google.com .. BUT the packet loss testing is done to imap.gmail.com intended to ensure an offshore connection and I presume that wasn't part of the issue you refer to Neil?

Talkiet

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#1509909 9-Mar-2016 14:35

Foiler:
Maybe a coincidence if the dates do match up?

Yes the webpage download times were measured for google.com .. BUT the packet loss testing is done to imap.gmail.com intended to ensure an offshore connection and I presume that wasn't part of the issue you refer to Neil?

Yes... the issue was offshore and outside of the spark bb network.

It's entirely likely that the loss was due to this issue.

Cheers N

Please note all comments are from my own brain and don't necessarily represent the position or opinions of my employer, previous employers, colleagues, friends or pets.

Foiler

220 posts

Master Geek

#1509921 9-Mar-2016 15:00

Ok thanks Neil .. so just a pure coincidence that we replaced the Mako at noon on the 23rd at the same time as the "fault" you refer to was resolved?

The bottom line is that the user experience did improve significantly at the same time so algud.

Talkiet

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#1509956 9-Mar-2016 15:40

Foiler:

Ok thanks Neil .. so just a pure coincidence that we replaced the Mako at noon on the 23rd at the same time as the "fault" you refer to was resolved?

The bottom line is that the user experience did improve significantly at the same time so algud.

I hate coincidences but in this case yes, a google affecting fault was fixed at that time :-)

Cheers - N

Please note all comments are from my own brain and don't necessarily represent the position or opinions of my employer, previous employers, colleagues, friends or pets.

yitz

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#1509983 9-Mar-2016 16:16

Is it still possible for the line profile to be shaped to FS/128 at Spark's end?

Talkiet

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#1509984 9-Mar-2016 16:18

yitz:

Is it still possible for the line profile to be shaped to FS/128 at Spark's end?

Anything is possible.

Likely? Even remotely? No.

Cheers - N

Please note all comments are from my own brain and don't necessarily represent the position or opinions of my employer, previous employers, colleagues, friends or pets.

BarTender

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#1510021 9-Mar-2016 17:15

Talkiet:
yitz:

Is it still possible for the line profile to be shaped to FS/128 at Spark's end?

Anything is possible.

Likely? Even remotely? No.

Cheers - N

Not 100% accurate. Chorus could be doing something particularly stupid. Especially if you have just been cabnetised from an ASAM to an ISAM. Weird things have occurred then.

But that is extremely unlikely edge case.

NonprayingMantis

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#1510022 9-Mar-2016 17:20

BarTender:
Talkiet:

yitz:

Is it still possible for the line profile to be shaped to FS/128 at Spark's end?

Anything is possible.

Likely? Even remotely? No.

Cheers - N

Not 100% accurate. Chorus could be doing something particularly stupid. Especially if you have just been cabnetised from an ASAM to an ISAM. Weird things have occurred then.

But that is extremely unlikely edge case.

even 'one in a million' chances happen to around 4 or 5 people in NZ. :)

yitz

2041 posts

Uber Geek

#1510030 9-Mar-2016 17:36

There are businesses out there whom are still on some truly ancient plans, not counting managed connections.

That is until they switch to UFB.