50M : SM4 area very poor performance

[ccarmock]

here it is:-



Ironically yesterday evening was fine too, so I am still unsure if they have made any true difference. As they made the change at 9:15 I need to give it a few days I suspect

Understood re bonded d/s but when I was testing when it was poor I was getting something like 1.5 Mb/s down and 5.3 Mb/s up, yet they still focus on the upstream....

[qasdfdsaq]

Doesn't look like any big change happened at 9:15, that's for sure.

Thing with the download is as it's bonded, everyone's already load-balanced across all available channels (probably). Hence they can't really do anything about downstream congestion short of installing new equipment (costly, long lead times). Upstream is easier as they can just shift people about.

Ignition would know better, but one of the mods ****ed him off and he's left the forum again

By the way, I recently had a graph that looked like yours, and had similar symptoms - but it turns out it could have been upstream congestion all along. Despite getting pathetic download speeds (5-10mbps) and full upload speeds, as soon as they doubled the upload capacity my download speeds shot up to the full 50mbps. Can't really explain it. Something to do with ACK suppression is my guess.

[ccarmock]

This is the graph I was sent:-


It shows a change to US 1 at 9:15, in that the number of users on it have dropped. I guess I might be still on it just that they moved others off to somewhere else.

Certainly things are fine tonight, but they weren't bad last night either, before this change.

Yikes Igni has gone from here - what a loss!

[qasdfdsaq]

ChartDirector (unregistered)??? Lol.

I really need to study on DOCSIS/HFC network architecture before I can say more. You did have a fairly low jitter last night (as I say, just <10ms).

There's a test somewhere that measures upstream and downstream jitter independently so you can tell which direction the congestion is in... I'll post it if I can dig it out. Like I say, even if it *looks* like downstream congestion - maybe it is - it sometimes isn't.

[ccarmock]

This area has *just* had the upstream bandwidth upgraded and 100 Mb/s released here. Also soon to be speed doubled, so this coudl all get worse again!

At the moment there are still 4 downstreams and one upstream.

Sadly the business services are not being speed doubled.