50M : Upstream congestion - business service

[Sephiroth]

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]

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]

Tried a UDP speedtest lately?

[ccarmock]

Not sure I have - is there one you can recommend?

[qasdfdsaq]

http://mcslhr.visualware.com/myspeed...city_50mb.html

[ccarmock]

Thanks - that one says unable to test

[qasdfdsaq]

Impressive

[Chrysalis]

Originally Posted by ccarmock

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]

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 :-




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

[Sephiroth]

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]

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]

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 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]

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]

Originally Posted by Chrysalis

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]

didnt say was deliberate.

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