Congestion Isn't Just VM Only

[Ignitionnet]

Tonight's excitement.



Download speed achieved during the test was - 25.86 Mbps
For your connection, the acceptable range of speeds is 61.86 Mbps-77.33 Mbps

[qasdfdsaq]

Back on Infinity myself, on the Aberdeen Denburn exchange which some providers say is having... problems... Should set up a monitor except a) TBB won't allow me to and b) the crappy HomeHub doesn't accept WAN pings.

[Ignitionnet]

Denburn should be fine now.

http://status.aa.net.uk/1902

[qasdfdsaq]

Interesting... Co-inhabitants have been reporting packet-loss/gaming lag since the 22nd funny enough, I've not had any real monitoring set up to see where it was, though we did have a BRAS outage a few days ago too.

[Ignitionnet]

This is fixed as of last night with a new physical backhaul link and enlarged SVLANs.

[qasdfdsaq]

Your place or mine? Got a before/after TBB chart?

[Ignitionnet]

Mine, and yes.

Last Tuesday:



This Tuesday:



Overnight drop was the work being done.

[qasdfdsaq]

Nice.

I've finally gotten round to replacing the dreaded Home Hub of Suckage with my own router imported from my Edinburgh Infinity line - and setting up a new TBB monitor (my account's been broken and not allowed me to create any new monitors for years now...)



As I say, Aberdeen Denburn exchange which supposedly had issues recently, and housemates constantly complaining about lag/packet loss and so forth - though I suspect some of that might have been related to the HH5 since it all disappeared as soon as I put my own custom router in it's place.

Seems I'm on an ECI DSLAM now as I now get upstream line stats too, which I didn't used to

Lets see how this goes... Not sure the monitor will stay up too long though, non-static IP and I'm still messing around with the network settings. Used to have average PPPoE uptime of 45+ days in Edinburgh but I doubt it'll manage the same here, even though I'm on the same BRAS.

[qasdfdsaq]

Originally Posted by Ignitionnet

Denburn should be fine now.

http://status.aa.net.uk/1902

Doesn't look very fine to me:



Also, been a while since I checked but it looks like there's load or congestion problems even on the core network from England up to Edinburgh (the following being BRAS')

[qasdfdsaq]

OK, well since I've already hijacked this thread, I was wondering if you could help me figure out at what level the problems are occurring with my BT Infinity connection.

So what I've figured out so far - firstly, whatever the issue is it's somewhere between my exchange (Denburn) and Edinburgh. That leg reaches saturation pretty much all day from 2pm to 2am now (reminiscent of VM issues I used to get). Download speeds drop from line rate (70Mbps+) to less than 10Mbps at peak times. Latency and packet loss pretty much exactly match your example of "bad 21CN congestion" earlier:



Now according to AAISP, Denburn should be fixed. Now I'm not sure what is fixed, and what other variables could perhaps be in play that cause issues specifically for BT, but not AAISP. Nonetheless BT Retail is seeing very low speeds and heavy packet loss, and I'm guessing AAISP is not. Both are BT Wholesale based.

What I also know is the physical pipe between Denburn and Edinburgh is not at saturation, as there are other links (e.g. the ptm.301 "backdoor" network on the Openreach modem) where I can ping some Juniper device somewhere around Edinburgh/Glasgow and receive consistent, loss-free and jitter-free responses throughout the day that do not get worse at peak times. Pinging the PPPoE gateway though, again in Edinburgh, does see increased packet loss and latency. So it's only the PPPoE based "Internet" connection that is affected by the congestion.

The physical pipe to the nearest core node or WBC interconnect (21CN backhaul?), isn't saturated, but whatever logical pipe BT Retail uses for Infinity is... What could it be? Is it likely to be the SVLAN again, or something else?

And more importantly, is it something BT can easily fix?

[Edit] Just noticed AAISP say Denburn is fixed, but Plusnet say is it not http://community.plus.net/exchange-information/

[qasdfdsaq]

Well, funny enough about 2am last night our connection went down and BT supposedly installed an additional 10G pipe for added capacity, no problems visible today.

Supplier investigating, capacity issue identified, capacity to be added, 10G was installed early morning and initial checks are showing good results, monitoring. 15/04/14

[muppetman11]

Infinity 2 connection



HomeHub 5 stats

6. Data rate: 20000 / 79995
7. Maximum data rate: 37191 / 130099
8. Noise margin: 16.9 / 22.0
9. Line attenuation: 0.0 / 8.3
10. Signal attenuation: 0.0 / 8.3

not a clue what all that means though

[qasdfdsaq]

It means that your connection is fine.

And with the correct upgrades your line could be capable of 200Mbps+