TekSavvy → Re: [DSL] Network congestion tonight?

Andre, we'll get the exact details shortly but essentially, we added 3 gig links that were idle back in november~ish. Then we upgraded all the links to full capacity effectively adding roughly another 3gig capacity in December.

Now we are waiting on 3 new physical gig links that should go live by the end of the month that will also be fully used...

so inside of 3-4 months we will have added roughly 9 gig of capacity for Bell DSL (ON and QC) alone.

Adding 1 Gb links at a time won't fix congestion like this (taken tonight around 6PM in North York on the Greenboro POI): »puu.sh/1KYLI

The net is almost useless during peak hours. Why do all ISP's around Toronto insist on oversubscribing their lines?

Edit: Only gets better as the night goes on!

»puu.sh/1KZyC

Thanks

Because Bell insists on only selling IISPs individual gigabit links at a time? They're still dragging their feet on 10 GigE links, making it very difficult for a large IISP to keep up with growth no matter how fast they add new links.

Then those ISP's which don't have capacity for more customers shouldn't sub-up more customers? Regardless of the circumstances behind the situation, it leaves a bad taste in customers mouths.

Sadly, the best Internet I have ever been able to get in the Toronto area has been a WiMAX solution from Bell. How sad is that?

Thank you Marc. Your efforts to build a solid and reliable network are a large part of why I'm a customer and I appreciate the insight into where things are at during this difficult time. I look forward to further updates as they become available.

That would work only if the whole trunk between TSI and Bell was treated like a single large pipe so load can be balanced between all available links or subsets thereof.

The way AHSSPIs work right now, bandwidth and individual subscriber sessions are statically allocated to a single GbE link. TSI could have 1000x GbE links to Bell and still get congestion simply because Bell's BAS decided to cram too many active subscribers on high-speed profiles on the same AHSSPI link which are still 1GbE each, leaving many of the others under-used.

Until 10GbE AHSSPI becomes available, there is little TSI (or any other ISP) can do about congestion. You can only cram 40 active 25Mbps subscribers per GbE before hiccups start and leasing enough AHSPIs to accommodate numbers anywhere near that low would be cost-prohibitive. If you allow a 6:1 oversubscription, you would be looking at about $100/month per 25M subscriber.

95% of the blame lies strictly with the Bell-GAS service and fee structure that makes bandwidth management by ISPs nearly impossible, very inefficient and very expensive. The simplest fix (or at least a huge step in the right direction) is 10G AHSSPI but as Guspaz said, Bell is in absolutely no hurry to make this easy and likely won't make it cheap either.