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-   -   120M : 152mb speed issues/ubr upgrade (https://www.cableforum.uk/board/showthread.php?t=33698178)

scoobydoo[uk] 07-07-2014 21:36
152mb speed issues/ubr upgrade
 
My area (stoke on trent) is being upgraded in August. I signed up for 152mb last month and during the day i can get this speed no problem on speedtest.net.

Come the evening, anything after 6pm and speeds drop like a stone, down to 50-80mb/s ,
I believe this is down to over subscription on the UBR, although a cat c was done on the UBR last year.

When an areas getting upgraded do they put more capacity onto the ubr?, if not then speeds are going to get even worse once the upgrade is completed in August.

Im hoping the answer will be more capacity but does anyone know?.

Nedkelly 07-07-2014 22:17
Re: 152mb speed issues/ubr upgrade
 
The cat c would split the nodes down . In this area we have 1 laser feeding 2 500 home nodes . So these 2 nodes would share the downstream freqs and the upstream freqs .So the catc would be done first depending on area and build so each node is ready to be fed by one laser per node . So when the upgrade is done each node has its own feed it doesn't share it with a another node . Hope this explains it a bit :)

qasdfdsaq 08-07-2014 01:38
Re: 152mb speed issues/ubr upgrade
 
50-80? That's nearly 800 times faster than what I used to get when it was congested... -_-

Sephiroth 08-07-2014 08:57
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by Nedkelly (Post 35712653)
The cat c would split the nodes down . In this area we have 1 laser feeding 2 500 home nodes . So these 2 nodes would share the downstream freqs and the upstream freqs .So the catc would be done first depending on area and build so each node is ready to be fed by one laser per node . So when the upgrade is done each node has its own feed it doesn't share it with a another node . Hope this explains it a bit :)
To add to that lucid explanation, I was in exactly the same position as you, except that my peak time speed was between 8 and 25 megs.

VM said that on 23-May, the area capacity upgrade would be made and sure, that's what happened. Now 160/12 24x7.

ianch99 08-07-2014 09:22
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by Sephiroth (Post 35712694)
To add to that lucid explanation, I was in exactly the same position as you, except that my peak time speed was between 8 and 25 megs.

VM said that on 23-May, the area capacity upgrade would be made and sure, that's what happened. Now 160/12 24x7.
Not always the case, my area has been "upgraded" but my utilisation fault (2 years this month) is still there with < 10Mbps d/s on some evenings from a 152/12 service

Sephiroth 08-07-2014 19:09
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by ianch99 (Post 35712696)
Not always the case, my area has been "upgraded" but my utilisation fault (2 years this month) is still there with < 10Mbps d/s on some evenings from a 152/12 service
How were you informed that your area had been upgraded? I was told (in forum) in direct response to the slow speed question I was asking.

ianch99 08-07-2014 19:32
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by Sephiroth (Post 35712816)
How were you informed that your area had been upgraded? I was told (in forum) in direct response to the slow speed question I was asking.
Richard told me:

Quote:
Your speed supercharge is ready!

Great news. We’ve upgraded our network in your area, so your speed supercharge is ready and waiting for you.
when I put in my post code in http://keepup.virginmedia.com/speedupgrade

"We’ve upgraded our network in your area" should possibly read "We’ve upgraded our network in your area except for those of you that we haven't"

AndyCalling 08-07-2014 19:45
Re: 152mb speed issues/ubr upgrade
 
What astonishes me re. 'oversubscription' is that it always seems to take VM by surprise, like they don't know how much capacity they have in an area until they have signed up too many people and it all falls over. Isn't there any way they can check if they have capacity before they sign up another customer? Thank goodness my landlord doesn't work like this! I would have to sleep standing up.

qasdfdsaq 08-07-2014 19:53
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by AndyCalling (Post 35712829)
Isn't there any way they can check if they have capacity before they sign up another customer?
Yes but not all VM agents or departments pay attention to it.

ianch99 08-07-2014 20:21
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by AndyCalling (Post 35712829)
What astonishes me re. 'oversubscription' is that it always seems to take VM by surprise, like they don't know how much capacity they have in an area until they have signed up too many people and it all falls over. Isn't there any way they can check if they have capacity before they sign up another customer? Thank goodness my landlord doesn't work like this! I would have to sleep standing up.
The Network teams have access to the upstream & downstream utilisation metrics on the various CMTS "cables" and having this information, could identify when these start to get congested and so commission the necessary works to alleviate the problem before it becomes a chronic issue.

However, in the VM world this seems not to happen, at least not around these parts. They seem to have a strategy of only starting work when the CMTS is regularly running at 100% in peak times. The works would be only triggered when enough people ring in and complain about the poor service. The icing on the cake is the possibility that the work needed to fix the problem could take months, if not years to complete.

VM seems more of a postcode lottery than the FTTC solutions ...

---------- Post added at 19:21 ---------- Previous post was at 19:18 ----------

Quote:
Originally Posted by qasdfdsaq (Post 35712832)
Yes but not all VM agents or departments pay attention to it.
I don't believe for one minute that the CS agents have a system that correlates a (new) customer's postcode with their CMTS network segment utilisation metrics and so flags a capacity warning when adding a new service or upgrading an existing one.

qasdfdsaq 08-07-2014 21:28
Re: 152mb speed issues/ubr upgrade
 
That's because CS have nothing to do with new customers.

ianch99 08-07-2014 21:35
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by qasdfdsaq (Post 35712875)
That's because CS have nothing to do with new customers.
but they have everything to do with existing ones ... for sake of clarity, CS == "the people you speak to on the phone when you want to order or upgrade Virgin Media broadband"

qasdfdsaq 08-07-2014 21:36
Re: 152mb speed issues/ubr upgrade
 
I don't speak to people on the phone, but if I did, it would be sales not CS when wanting to order broadband.

When you want to upgrade broadband that's another matter, and those agents *do* have access to metrics that say whether an area is oversubscribed or not.

ianch99 08-07-2014 21:40
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by qasdfdsaq (Post 35712881)
When you want to upgrade broadband that's another matter, and those agents *do* have access to metrics that say whether an area is oversubscribed or not.
Don't believe it

Nedkelly 08-07-2014 23:13
Re: 152mb speed issues/ubr upgrade
 
The trigger level is over 70% for x amount of time . So some nodes can hit 80% for 30 mins in one day and thats the highest it will be for a whole week . Then there are the nodes that do it every day at set times these are the ones that go forward for a reseg :)

The Installer 08-07-2014 23:31
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by ianch99 (Post 35712883)
Don't believe it
And you'd probably we wise not to ;)

ianch99 09-07-2014 00:07
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by Nedkelly (Post 35712948)
The trigger level is over 70% for x amount of time . So some nodes can hit 80% for 30 mins in one day and thats the highest it will be for a whole week . Then there are the nodes that do it every day at set times these are the ones that go forward for a reseg :)
I guess "go forward" in this context means "put on the list of work we will need to do eventually if enough people complain about it" :)

scoobydoo[uk] 09-07-2014 21:57
Re: 152mb speed issues/ubr upgrade
 
Had a reply on the virgin technical forums and they said that low speeds are down to spikes in utilisation but they arent at a level to esculate yet, 25mb on a 152mb service all evening isn't low enough?!! Crazy

slowcoach 10-07-2014 00:31
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by scoobydoo[uk] (Post 35712643)
My area (stoke on trent) is being upgraded in August. I signed up for 152mb last month and during the day i can get this speed no problem on speedtest.net.

Come the evening, anything after 6pm and speeds drop like a stone, down to 50-80mb/s ,
Exactly the same here in Oldham, we are also due the upgrade in August, I am assuming the disconnections of 2-3 hours a few times a week are a sign that work is being done.

Ignitionnet 10-07-2014 01:22
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by Nedkelly (Post 35712948)
The trigger level is over 70% for x amount of time . So some nodes can hit 80% for 30 mins in one day and thats the highest it will be for a whole week . Then there are the nodes that do it every day at set times these are the ones that go forward for a reseg :)
Has it been changed from >90% for 10% of a rolling 7 day period?

The number you mention there was the old ntl value but I thought that disappeared post-merger?

---------- Post added at 00:22 ---------- Previous post was at 00:20 ----------

Quote:
Originally Posted by slowcoach (Post 35713135)
Exactly the same here in Oldham, we are also due the upgrade in August, I am assuming the disconnections of 2-3 hours a few times a week are a sign that work is being done.
Hmm no. Upgrades should be a single disconnection or group of disconnections, generally in the middle of the night.

Kushan 10-07-2014 16:13
Re: 152mb speed issues/ubr upgrade
 
Quote:
Originally Posted by Nedkelly (Post 35712948)
The trigger level is over 70% for x amount of time . So some nodes can hit 80% for 30 mins in one day and thats the highest it will be for a whole week . Then there are the nodes that do it every day at set times these are the ones that go forward for a reseg :)
Ignitionnet beat me to it - has this figure changed recently? It used to be an obscene 99% utilisation for 10% on < DOCSIS3 and I think 90% utilisation for > 10% of the time on DOCSIS3.

qasdfdsaq 10-07-2014 16:57
Re: 152mb speed issues/ubr upgrade
 
WTF?! 99% util?! I'd be surprised if it was even possible to hit that level of utilisation, particularly on the upstream.

Then again I do recall once being told by VM my segment was at 90% utilisation 90% of the time, when I was complaining about slow speeds...

Kushan 10-07-2014 17:03
Re: 152mb speed issues/ubr upgrade
 
Yup, this was years and years ago though (~2009 I think?), I think (hope) it has changed since then.


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