Tag Archives: LLU

UK Internet with BT 21CN

Well, I’ve not posted for a while. and there’s good reason too. I’m always a big fan of Technology, the way it’s moving and what it brings with it. The Internet is one of those things that has been moving relatively rapidly (though maybe not so much for the normal home-user). However with my ISP, I do get to test some nice connections (sometimes) and connect to test networks, with test routers and so on. I even run a router that I have written a bit of code for, so that I can run my IPv6, VPN links, Fail-over connections & some customised routes (including a tunnel system to have IPv6 on my laptop no matter where I am in the world).

Anyway, For those that don’t know, In the UK most of the lines are supplied by BT, This means if you want internet you can choose any supplier you want, but many of them will be using BT lines to your house, and BT equipment to hook it all up. This, however isn’t too bad, or rather, Wasn’t. BT have been rolling out their 21CN network, which I am connected to, this is supposed to be next generation ADSL, when it was first installed, it was OK, and around a month ago it became unusable. My ISP (AAISP) has been attacking BT regarding this problem, and I’m not alone with the problem, there seemed to be a number of people on my exchange that had the same problem. this is what I get on my line:

Jason Line Graph

The Green bars (going up) ar latency on the line, the higher that bar, the slower things are to respond.
The Red bars (going down) are loss on the line – the lower this bar the less things that get to you
The White is a line disconnect
and the green dots are download (from the internet), and reddish-brown is upload (to the internet)

As you can see, if I tried to download anything I got latency (went slow) packet loss (things just didn’t get to me) and line drops. not to mention my download speek was around 50K if I was lucky on a 4mb line. BT have access to these graphs, and persisted for a very long time that there was nothing wrong with the line. Anyway, a couple of nights ago, they admitted there was a problem, and nailed it down to a Cisco IOS bug in some of their routers, and they did some test work on my exchange / BRAS last night, this took them around 45 minutes and all of a sudden my line was alot better. and I could download at my full speed.

This problem with BT (along with a few others) that seem to show just how incompetent BT are at times has pushed my ISP to look into otherĀ  wholesale LLU providers, as an extra option on the BT infrustructure. Although I’m not exactly a fan of some LLU providers from what I’ve seen of BT, could they possibly be worse? probably not.

just to note: this isn’t the case that this problem existed, I can deal with that, technology has it’s problems. What I can’t deal with, is companies like BT that have sole control over fixing them, saying there isn’t a problem when they have been given the evidence to show that there is a problem.

I will be looking forward to the FTTC rollout, and will be testing it. Lets hope BT can do a better job with that than they have done with 21CN

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edit:
BT Have finally fixed my line (actually they did this last week) and everything has been working again, and of-course I’m getting my full download-speeds again. still – I’m waiting for FTTC and my ISP have signed up for Be* LLU wholesale – so I may switch to this to get away from BT for a short while. – This turned out to not be a bug in the code, but they had over filled the pipes from Basingstoke…. Thanks BT, Nice going…