Maxing out 100M

[ScottSilver]

When I was on 50Mbit, my speed tests would always be around 50.50Mbit down and always 4.8Mbit up. Now I'm on 100Mbit I've noticed I can't quiet get the same ratio as I did on 50Mbit.

My average speed on 100Mbit is 96Mbit down and 7.5Mbit up. I'm not complaining and there is no way I'll downgrade but I just wondered if anyone had any tips on how to get the little extra juice out of my connection?

Thanks.

Edit: Hmm, seems my connection is faster to Paris than London?!

https://www.cableforum.co.uk/images/local/2011/07/84.png
https://www.cableforum.co.uk/images/local/2011/07/85.png

[Graham M]

I'd be happy with that ;)

[ethan103]

I'd be happy with that ;)

[adzii_nufc]

Seen this post and ran downstairs to order! VM were meant to inform me when it arrived here -_-

Looks good at your end though!

[qasdfdsaq]

Speedtest.net's technology just isn't that good at measuring fast uploads, and VM's DOCSIS network isn't that great at handling fast uploads either.

Still, 9.3mbps is 6x more than the best I can get around here (at least till September) so I'd be happpy too. 93% of advertised speeds is pretty decent.

[Ignitionnet]

96Mbps is about as fast as you'll get. The 100Mbps is capped at 102,400,000 bps, the 50Mbps is capped at 53,000,000 bps so reaching about 50Mbps is possible.

Any speed test that says you're getting the full 100Mbps after overheads is wrong.

[theoldbill]

Start multiple file uploads (vob files etc) to Rapidshare to truly test upstream, you'll get ~9.6meg if all is uncongested.

~97 meg is the most I've seen on Speedtest.net, but with Du Meter and the VM engineer speed testers the full 100meg is seen.

[ScottSilver]

Seen this post and ran downstairs to order! VM were meant to inform me when it arrived here -_-

Looks good at your end though!

I've had it about a month now. It's fantastic, could never go back to 30Mbit or under. Can do so many things at once.

I'm happy with my connection. Don't forget to join the speedwave! (See my sig).

---------- Post added at 21:04 ---------- Previous post was at 21:01 ----------

96Mbps is about as fast as you'll get. The 100Mbps is capped at 102,400,000 bps, the 50Mbps is capped at 53,000,000 bps so reaching about 50Mbps is possible.

Any speed test that says you're getting the full 100Mbps after overheads is wrong.

You're right! Thats about 97.65Mbit. Naughty VM!

[Ignitionnet]

Nope 1Mbps = 1 million bits per second. 102,400,000bps = 102.4Mbps.

I'm sure there are reams of geeks whose exposure to communications is forums on the internet and nothing else who'll argue furiously but that's the definition me, the International System of Units and the Internet Engineering Task Force use. :)

[theoldbill]

Igni, do you think the upstream congestion will ALWAYS be an ongoing problem on Cable with the higher speeds?

768kbps was pretty much a guaranteed availability for a lot of us back then, but now it's rare to tap the headline upstream speeds :(

[ScottSilver]

Nope 1Mbps = 1 million bits per second. 102,400,000bps = 102.4Mbps.

I'm sure there are reams of geeks whose exposure to communications is forums on the internet and nothing else who'll argue furiously but that's the definition me, the International System of Units and the Internet Engineering Task Force use. :)

I converted 102,400,000 via google and got 97.65 :s Ahh well - not sure why we can't max it to 100?

[theoldbill]

I converted 102,400,000 via google and got 97.65 :s Ahh well - not sure why we can't max it to 100?

Because the config file in the modem restricts it to the 10240000 you mentioned. It's intentional by VM.

[Ignitionnet]

Igni, do you think the upstream congestion will ALWAYS be an ongoing problem on Cable with the higher speeds?

768kbps was pretty much a guaranteed availability for a lot of us back then, but now it's rare to tap the headline upstream speeds :(

No. Once they sort upstream bonding (double to quadruple bandwidth per area) and higher order modulations (50% more bandwidth per channel) things should be better.

Still early days, getting the higher uploads out as quickly as possible was the plan, consolidation progressing.

[qasdfdsaq]

Taking their sweet time as it is just rolling out higher uploads, at this rate I'll be a decade older by the time they have bonding and 64QAM all working :-P

[Ignitionnet]

Areas like ours that are getting overbuilt will have full DOCSIS 3 spec - 5-85MHz upstream band and 1GHz downstream.

Amusingly our areas should be among the first to have 200Mbps/20Mbps released. Even node splits will be easier as the new kit will offer digital return paths so can be trivially resegmented through frequency stacking the digitised returns and demuxing them at the head end / hub site.

That was for qasdfdsaq's consumption by the way, apologies to everyone else :)

[theoldbill]

Given that the upstream channel is already 20meg wide, do you think they may unleash this in the config file or not even consider that without using bonding, for future tiers (or hopefully, extra 'speed boost' add-ons)?

[Ignitionnet]

Given that the upstream channel is already 20meg wide, do you think they may unleash this in the config file or not even consider that without using bonding, for future tiers (or hopefully, extra 'speed boost' add-ons)?

Given that the upstream channel only delivers about 18Mbps of usable data and latency and jitter degrade at 13-14Mbps of that 18 being utilised no.

[theoldbill]

Given that the upstream channel only delivers about 18Mbps of usable data and latency and jitter degrade at 13-14Mbps of that 18 being utilised no.

I can lock onto either 358xxxxxxxhz or 458xxxxxxxhz, why not just bond those for now? That said I don't think the copper side is the bottleneck for me.

[qasdfdsaq]

That's downstream. And downstream is already bonded.

Just because you can lock onto something does not mean the equipment at the other end is capable of simultaneously receiving and combining both.

---------- Post added at 19:28 ---------- Previous post was at 19:27 ----------

Areas like ours that are getting overbuilt will have full DOCSIS 3 spec - 5-85MHz upstream band and 1GHz downstream.
:)
Freaking awesome :D

[theoldbill]

That's downstream. And downstream is already bonded.



Nope. At modem reboot it will lock to either 358xhz or 458xhz on the upstream, randomly. Unbonded as in one channel locked at a time, but what's stopping them bonding those together, now?

[qasdfdsaq]

You said:

I can lock onto either 358xxxxxxxhz or 458xxxxxxxhz, why not just bond those for now? That said I don't think the copper side is the bottleneck for me.

4,58x,xxx,xxxhz = 4580Mhz. Upstream stops at 50Mhz, 4580Mhz is way off the scale, but I'd assumed you meant 458Mhz which is a downstream frequency. If you meant 45.8Mhz you added two X's too many

---------- Post added at 19:48 ---------- Previous post was at 19:48 ----------

what's stopping them bonding those together, now?
The equipment is not capable of it.

[theoldbill]

You said:



4,58x,xxx,xxxhz = 4580Mhz. Upstream stops at 50Mhz, 4580Mhz is way off the scale, but I'd assumed you meant 458Mhz which is a downstream frequency. If you meant 45.8Mhz you added two X's too many

Oh stop splitting hairs, I truncated the frequency deliberately. Anyone who wanted to reply constructively would have realised what was meant.

(Please read the context of the thread before jumping in)

[qasdfdsaq]

The context of the thread was about getting 100mbit service. You're the one who jumped in and took it off topic... Please try less hypocrisy next time you criticize someone who just answered your question.

[theoldbill]

The context of the thread was about getting 100mbit service. You're the one who jumped in and took it off topic... Please try less hypocrisy next time you criticize someone who just answered your question.

I'm sorry. If someone like Ignition had replied I'd have called that a qualified reply.

[Stephen]

Stop the arguing please.

[Ignitionnet]

Nope. At modem reboot it will lock to either 358xhz or 458xhz on the upstream, randomly. Unbonded as in one channel locked at a time, but what's stopping them bonding those together, now?

Probably the software on the CMTS isn't supporting bonding yet, software is available though whether VM have it on their kit or not yet is different. There's also the matter of how the non-DOCSIS 3 aware stuff would react to bonded channels and making arrangements for that too.

Also port density, they've been running on the Motorola BSR with 1 upstream per node and 4 downstreams split across 4 nodes, they have to resegment the network further as the standard line cards are 8 upstreams, 2 x 4 downstreams. They'd be looking towards new line cards for that.

The biggest reason is that there is no need. If it were easily doable they would be doing it, a single bonded 36Mbps channel with twice as many modems on it will perform better due to statistical contention than two unbonded 18Mbps channels with the modems split exactly between them.

VM would have the best idea of the specific caveats they have at this time, but they will be there. If they could, rather than running two separate upstreams, they would.