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Standard User Wuffles
(newbie) Mon 13-May-13 00:13:06
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Latency & Packet loss


[link to this post]
 
Iíve been using o2 happily for a couple of years as my ISP. Over the last week or so I have seen a rather noticeable decline in the quality of my broadband. I decided to just ignore it for a while assuming it was something related to this core migration they're in the middle of and/or perhaps something to do with the move to Sky. As I was very busy for the last week doing other things, I found having less distraction from the internet was actually a good thing. However things are still not showing any signs of improving and I really miss my connection being normal, so I thought Iíd reach out to the community and see if anybody has any suggestions or recommendations for me to improve the situation.

Iíll start off with a little background on how I use the connection and why I used to be so very pleased with the quality of service I received. Firstly Iíll mention that I have never had more than an average amount of bandwidth due to the area I live in, but on my 8mbit package from o2 I have always synced at 7 to 7.5 down and 1.2 to 1.5 up which has been more than sufficient for my needs.

My primary use of the connection is actually for online gaming. This means that for me personally, I am more concerned with my latency to any local services I use and not experience packet loss. This is actually the reason I have always been very happy with my connection, because it has been very reliable in the past regarding decent routing and packet loss. I was always the envy of my friends on vermin media with my rock stable ping even at peak times. Recently though things have been quite different indeedÖ

About a week ago on a Friday I found myself with a much higher latency across all services I use for gaming. For example I rent a voice and game server in the south, and found my average ping was around 45 with a jitter of 70 or so. This obviously caused some concern as I was used to having 20-22 give or take a few milliseconds. What made matters even worse was that I seemed to be suffering rather horrible packet loss at times for no apparent reason. Now for me even 1% would be a huge problem due to the nature of the games I like to play, but this was even more severe Ė quite often above the 10% range! This obviously meant that VoIP and gaming were out of the question so I checked my own network to make sure no devices were saturating my connection and causing issues. As it turned out nothing was using the connection on my network so I decided to put it down to some maintenance and just go and enjoy my weekend. Things would be better on Monday surely, right? See the following screenshot for an example of how my VoIP connection often looks these days:

VoIP screenshot

Monday evening came and my connection was still acting very poorly so I decide to check my bandwidth and run some more latency tests. I did notice that my bandwidth has dropped to around 6mbit and 1mbit up, which whilst not as high as Iím used to is still perfectly sufficient for my needs. Latency though did seemed to vary a lot. Earlier in the evening it seemed ok, although still double what it should be it was at least stable and without packet loss. However after a few hours it seemed to suffer spikes of packet loss again making my friends sounds like robots over VoIP and my gaming experience rather depressing.

Seeing as though my issues were not consistent, and I could sometimes have a couple of hours where things would work normally, I decided to run a latency monitor (provided by thinkbroadband) on my connection to plot my packet loss and latency over time to see if I could spot any correlation as to when things are happening. It seems to me that the problems occur randomly throughout the day, but certainly more frequently during the evening and on weekends. Below is a snapshot of such a graph showing the previous 24 hours to now. Yes, as it happens the connection is behaving normally as I type this with a minimum ping of 20, and a maximum of not much higher. As you can see from the graph though, it has been so horrible all afternoon even hitting 40% packet loss! Please note: the connection was completely unused until around 8pm when I arrived home. Up until then the only device powered up was the router itself responding to the ping messages.

Quality Graph

Further to posting this, Iím toying with replacing the router for a few days with a spare I just happened to have lying around. It doesnít feel like a hardware issue though, and as I write this my ping is absolutely solid and everything is hunky dory. I really would appreciate some ideas or suggestions on what I could try next.


Thanks in advance,

Adam
Standard User XRaySpeX
(eat-sleep-adslguide) Mon 13-May-13 00:45:02
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Re: Latency & Packet loss


[re: Wuffles] [link to this post]
 
Router stats please? And exchange?

1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC - BQM

Edited by XRaySpeX (Mon 13-May-13 00:46:22)

Standard User Wuffles
(newbie) Mon 13-May-13 00:57:13
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Re: Latency & Packet loss


[re: XRaySpeX] [link to this post]
 
I'm not used to having issues at all so I'm not entirely sure which stats you require.

The router I'm using currently is a Billion BiPAC 7800N, running firmware version 1.06g

My connection is through the ADSL port, using MPoA 0/101 protocol and synced at 1170/6921 kbps for 7 days. This is a little lower than I expected but not enough to cry about.

Is there anything specific stat you would be interested in? I'm not too familiar with the control panel for this router as it's only about a year old and apart from an initial setup and firewall configuration I haven't actually touched it much.

I believe my exchange is 'Burnley' LCBUR

Edited by Wuffles (Mon 13-May-13 01:05:34)


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Standard User tommy45
(knowledge is power) Mon 13-May-13 01:39:40
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Re: Latency & Packet loss


[re: Wuffles] [link to this post]
 
LCBUR reported as having congestion on the BE forums back in January 13 also The BE user group site reports a nearby exchange Padiham is congested which is confirmed by BE LCPAD So It's likely that this could be having an affect, if it one of the exchanges that is daisy chained to the Burnley exchange

Standard User XRaySpeX
(eat-sleep-adslguide) Mon 13-May-13 13:56:38
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Re: Latency & Packet loss


[re: Wuffles] [link to this post]
 
In reply to a post by Wuffles:
Is there anything specific stat you would be interested in?
Connection/Sync Speeds, ADSL Mode in operation, Attenuations, NMs - just to check nowt untoward.

1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC - BQM
Standard User Wuffles
(newbie) Mon 13-May-13 19:38:03
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Re: Latency & Packet loss


[re: XRaySpeX] [link to this post]
 
Ok I've pulled the ADSL stats from the router and they're as follows:

adsl: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 8000
Max: Upstream rate = 1166 Kbps, Downstream rate = 9691 Kbps
Path: 0, Upstream rate = 1170 Kbps, Downstream rate = 6921 Kbps

Link Power State: L0
Mode: ADSL2+
TPS-TC: ATM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 8.8 6.7
Attn(dB): 45.5 27.4
Pwr(dBm): 18.8 12.3
ADSL2 framing
MSGc: 59 16
B: 99 33
M: 1 1
T: 2 3
R: 16 0
S: 0.4975 0.9963
L: 1865 273
D: 64 1
Counters
SF: 41589913 90184
SFErr: 1565 1768
RS: 1111721410 0
RSCorr: 5734484 0
RSUnCorr: 28106 0

HEC: 907 1584
OCD: 0 0
LCD: 0 0
Total Cells: 2388275890 1854550396
Data Cells: 350911617 134073498
Drop Cells: 25872
Bit Errors: 0 119478

ES: 1162 1106
SES: 0 0
UAS: 35 35
AS: 672572

INP: 2.19 0.00
PER: 16.17 16.43
delay: 7.96 0.24
OR: 32.15 10.70

Bitswap: 23359 12057

Total time = 1 days 18 hours 50 min 18 sec
FEC: 5734484 0
CRC: 1565 1768
ES: 1162 1106
SES: 0 0
UAS: 35 35
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 5 min 18 sec
FEC: 869 0
CRC: 4 0
ES: 4 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 1356 0
CRC: 0 10
ES: 0 6
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 18 hours 50 min 18 sec
FEC: 860954 0
CRC: 212 162
ES: 147 106
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 788582 0
CRC: 215 117
ES: 165 81
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Since Link time = 7 days 18 hours 49 min 31 sec
FEC: 5734484 0
CRC: 1565 1768
ES: 1162 1106
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Standard User XRaySpeX
(eat-sleep-adslguide) Mon 13-May-13 20:04:48
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Re: Latency & Packet loss


[re: Wuffles] [link to this post]
 
Stats pretty good! You'd normally sync at about 7.2 Meg. Slight reduction due to higher than normal NM of 9dB.

Increase of ping might be due to running Interleaved (Down) rather than maybe Fast Path previously.

1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC - BQM
Standard User Wuffles
(newbie) Mon 13-May-13 20:29:19
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Re: Latency & Packet loss


[re: XRaySpeX] [link to this post]
 
I thought about that too but surely that'd be more of a constant increase in my ping? I always used interleaved before and have been happy with the 20-25 ping to UK servers. If you look at a graph of latency for today it has been, and still is actually, pretty good; If I had played an online shooter during some of the times today I would have had an absolutely flawless experience I'm sure!

Live graph

However as we're nearing the evening, which at the moment is the only time I can play, it's starting to worsen. If you look towards the right to right about now, the average ping is rising from 20 to around 40 for no reason. I'm maybe making 2 or 3 tiny web requests per minute, so traffic is practically idle. There's also a small amount of packet loss starting to appear which I would forgive if I was hammering the line, but I'm not crazy

I have a feeling it's going to stay like this until around 12 or 1 am when it will start to return to normal.

As you've noticed my bandwidth is not too bad, but to be honest with you I'd rather sync at 4mbit if it meant having no packet loss and a consistent latency. I don't need to download anything at the moment.
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