cancel
Showing results for 
Search instead for 
Did you mean: 

Download & Upload Speeds Fluctuating

bazzer
Pro
Posts: 305
Thanks: 144
Registered: ‎10-12-2010

Download & Upload Speeds Fluctuating

During the last couple of days I have noticed my upload and download speeds fluctuating immensely.

For example, I normally achieve about 60mbps download and 18mbps upload.

However, I am now seeing a download of about 4mbps and upload of 3mbps. Sometimes the upload speed is greater than the download.

My line was tested and that did not show any abnormalities.

I asked PN if my connection was being throttled as for the past two weeks I have been conducting a backup to the cloud and this, in total, will be 6TB. I wondered if my increased data caused PN to restrict my speeds, but they said I am on an unlimited data plan, and they would not do that.

If my line appears to be OK what might have caused this? I have changed nothing other that commence a large backup.

7 REPLIES 7
Plusnet Help Team
Plusnet Help Team
Posts: 1,237
Thanks: 194
Fixes: 60
Registered: ‎09-10-2018

Re: Download & Upload Speeds Fluctuating

Thanks for your post @bazzer.

 

Whilst we wouldn't physically throttle your speeds, it wouldn't be unusual for somebody who's uploading 6TB of data to get a slower than expected download speed.

 

On checking the usage, we can see that you're using a very large proportion of your overall bandwidth on upload, which would tally with my suspicion that the backup is causing your reduced download speeds:

 

1573061736-5dc30468ccbfc

 

You should notice the download speeds pickup once the backup completes but if for any reason you don't, please let us know.

If this post resolved your issue please click the 'This fixed my problem' button
 Owen P
 Plusnet Help Team
bazzer
Pro
Posts: 305
Thanks: 144
Registered: ‎10-12-2010

Re: Download & Upload Speeds Fluctuating

@OskarPapa Hi. Thanks for your reply.

The upload could take an extremely long time if I am only able to upload at 4 or 5mbps which is what I'm currently seeing instead of nearly 20mbps.

Once the upload is complete I will be back to my normal usage which I imagine is quite low.

What can be done to return to my normal bandwidth?

Plusnet Help Team
Plusnet Help Team
Posts: 1,237
Thanks: 194
Fixes: 60
Registered: ‎09-10-2018

Re: Download & Upload Speeds Fluctuating

Thanks for getting back to me.

 

Can I check if you're running the test with the uploads still running? If so, you're not going to be getting an accurate picture of the actual upload speed as a lot of it will be in use for the backup you're doing at the moment.

 

It may also be worth having a look at at this bufferbloat guide as (on consultation with @MatthewWheeler) it's definitely a possibility that you're being affected by it at the moment.

If this post resolved your issue please click the 'This fixed my problem' button
 Owen P
 Plusnet Help Team
bazzer
Pro
Posts: 305
Thanks: 144
Registered: ‎10-12-2010

Re: Download & Upload Speeds Fluctuating

@OskarPapa Hi, yes, I have been running the speed test with the backup ongoing but despite this I sometimes get results which indicate my normal speeds are being achieved yet others show a massive decrease.

I will take a look at the bufferbloat guide you provided.

Thanks.

Plusnet Help Team
Plusnet Help Team
Posts: 14,737
Thanks: 4,570
Fixes: 757
Registered: ‎21-04-2017

Re: Download & Upload Speeds Fluctuating

Thanks for getting back to us @bazzer

No problem, let us know how you get on.

If this post resolved your issue please click the 'This fixed my problem' button
 Anoush Mortazavi
 Plusnet Help Team
bazzer
Pro
Posts: 305
Thanks: 144
Registered: ‎10-12-2010

Re: Download & Upload Speeds Fluctuating

@Gandalf @OskarPapa Hi, just an update to say that I tested my broadband speed several times yesterday and again today using the DSL Reports site and the BT Wholesale site.

Admittedly I did so without shutting down web pages or the backup that I'm currently uploading and the results of the speed test were either great - downloads of 55-60MBPS or very poor - 3-5MBPS.

Same with uploads of between 3 - 19 MBPS.

The bufferbloat readings were low (10ms) for the high speeds and high (192ms) for the low speeds.

If you think the variance I am seeing is purely attributable to the backup I'm performing and not line issues I will review again once the backup is complete.

Another issue I have encountered which has been ongoing for many months, and I wonder if the two are connected, is a Line Cord Error message I receive on my home phones which are cordless.

It used to happen frequently and each time it occurred I could not make any outgoing calls until such time as the problem cleared itself which would normally be about 5-10mins after the error appeared although if I rang my home number using a mobile the issue would clear immediately.

I changed the phones and this appeared to resolve the matter until recently when the error message has appeared again although not as frequently.

 

 

Plusnet Help Team
Plusnet Help Team
Posts: 1,543
Thanks: 288
Fixes: 87
Registered: ‎26-03-2018

Re: Download & Upload Speeds Fluctuating

Hi @bazzer,

 

Thank you for providing this update. I'm sorry to hear that your speeds are still up and down. As our tests aren't picking up any problems with the broadband from here so it may well be the case that the backup is what's leading to this problem. Please let us know if you continue to experience any problems with your connection after the backup has completed.

 

I'm sorry that you're experiencing intermittent problems with your landline. Thank you for confirming that you've tried new handsets but the issue still occurs. Testing your line hasn't found any problems with your landline at the moment but, with it being an intermittent fault, it can be more difficult to track down the cause. Please get back in touch next time this happens and we will investigate this further for you.

If this post resolved your issue please click the 'This fixed my problem' button
 Emily D
 Plusnet Help Team