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-   -   50M : Upstream congestion - business service (https://www.cableforum.uk/board/showthread.php?t=33689126)

Sephiroth 19-08-2012 20:49

Re: Upstream congestion - business service
 
They'll have resegmented, possibly. It's the only explanation. You went from 4 DS to 5 and moved upstream into an upgraded range. It just strikes me that they haven't taken network segment loads into accouint when they stuck several localities onto a particular segment.

That would explain the symptoms you describe.

ccarmock 21-08-2012 20:26

Re: Upstream congestion - business service
 
In my case - just moved to a different upstream, and getting 5 Mb/s upload but only 8 Mb/s download right now on a 50 Mb/s business service

qasdfdsaq 22-08-2012 11:31

Re: Upstream congestion - business service
 
Tried a UDP speedtest lately?

ccarmock 22-08-2012 22:44

Re: Upstream congestion - business service
 
Not sure I have - is there one you can recommend?

qasdfdsaq 22-08-2012 22:53

Re: Upstream congestion - business service
 
http://mcslhr.visualware.com/myspeed...city_50mb.html

ccarmock 22-08-2012 23:05

Re: Upstream congestion - business service
 
Thanks - that one says unable to test

qasdfdsaq 23-08-2012 11:08

Re: Upstream congestion - business service
 
Impressive :)

Chrysalis 23-08-2012 11:25

Re: Upstream congestion - business service
 
Quote:

Originally Posted by ccarmock (Post 35465044)
Yes I understand why upstream congestion can cause downstream performance issues. but since I am getting the full 5 Mb/s upstream it doesn't seem congested....

my experience of upstream congestion on VM is that at first it will affect jitter, then after download speeds, and then only after that upload speeds.

In short people uploading data appear to get priority over acks and small packets. If I was running VMs network I would swap it round so uploading data takes a hit to maintain ack's and small packet performance.

As for the modem choosing the channel, that seems open for debate.

the vmng300 (my vmng300 since seph disagrees with me) only seems to change upstream when its favoured one is down, whilst my superhub on older firmware will change with power cycling although not easily but possible. So the R36 behaviour change could well be making it like the vmng300 on channel selection?

ccarmock 23-08-2012 12:09

Re: Upstream congestion - business service
 
That makes sense. I was surrpised to get the full 5 Mb/s up but 10% of what I expect down.

VM Business were able to force the Superhub onto a different upstream, but that is as congested it seems as the previous one.

Here is my Thinkbroadband graph - looks like classic congestion :-

http://www.thinkbroadband.com/ping/s...23-08-2012.png


The business superhub runs different firmware and is on 5.5.2R04T15-BU

Sephiroth 23-08-2012 13:26

Re: Upstream congestion - business service
 
Seems to make anonsense of the QoS settings I though business users benefitted from. Is that part of the contract or have they moved away from that too?

babis3g 24-08-2012 00:16

Re: Upstream congestion - business service
 
It seems congestion affects everyone...
This is bad...from 7pm to 11:30 is terible
Post this to VM forums and mention you have business...ask to change the upstream to better one even if they did all ready
Ask them if they going to do any fix for your congestion at your area or at least call them again
Hopefully they will do something about it

Kymmy 24-08-2012 07:32

Re: Upstream congestion - business service
 
Normally if you post on the VM forums and mention you have business the only answer you get is that they only deal with residential :rolleyes: Business does have a 24/7 faults support line though it does tend to be only upto 2nd line outside of business hours.. No idea if that's changed since I left VMbusiness about March this year

ccarmock 24-08-2012 20:53

Re: Upstream congestion - business service
 
Given that I have been told congestion relief needs more equipment at the node that requires building work to take place I am surprised that they haven't just enabled more upstream & downstream channels.

This area is still served by 4 d/s channels. I woudl have thought a quick way to provide congestion relief would be to provide more channels.

I assume this is enabled at the headend logically on the CMTS as opposed to more equipment?

qasdfdsaq 26-08-2012 04:19

Re: Upstream congestion - business service
 
Quote:

Originally Posted by Chrysalis (Post 35466570)
In short people uploading data appear to get priority over acks and small packets. If I was running VMs network I would swap it round so uploading data takes a hit to maintain ack's and small packet performance.

"Never ascribe to malice that which is adequately explained by incompetence"

In other words, it might not be deliberate, but a side-effect of DOCSIS 3 grant behaviour, which VM have yet to deal with...

Chrysalis 26-08-2012 13:16

Re: Upstream congestion - business service
 
didnt say was deliberate.

Of course why havent they dealt with it? have they accidently not dealt with it?


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