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Fibre connection dropping... Any thoughts?

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Executive Producer
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Re: Fibre connection dropping... Any thoughts?

@jamesn123

 

G.INP is kicking in a lot so high amounts of error correction. Estimated distance to London 150-175 miles.

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Re: Fibre connection dropping... Any thoughts?


@mae-3 wrote:

@jamesn123

 

G.INP is kicking in a lot so high amounts of error correction. Estimated distance to London 150-175 miles.


170 Miles by road yes Smiley Happy

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Re: Fibre connection dropping... Any thoughts?

@jamesn123

 

We crossed in our posts there, so my estimate was actually done whilst you were writing your post! Too much jitter on the line because of error correction and the speed is being impacted as well because of that fact, so that's why the download speed is around the 70Mbps. I know it's not much but it's really the fault that we are looking at so that's important. Speed should be around the 72 to 73Mbps figure, may be slightly higher because of G.INP.

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Re: Fibre connection dropping... Any thoughts?

Strange that none of the online tools i've used have reported any jitter... The error correction would make sense though and fits in with the current issue

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Re: Fibre connection dropping... Any thoughts?

@jamesn123

 

This is what it should look like and I'm in the South West UK, Plymouth to be precise. You'll notice my jitter is very low and that's without G.INP.

 

root@embleton:~# ping bbc.co.uk

PING bbc.co.uk (151.101.0.81) 56(84) bytes of data.

64 bytes from 151.101.0.81 (151.101.0.81): icmp_seq=1 ttl=60 time=11.4 ms

64 bytes from 151.101.0.81 (151.101.0.81): icmp_seq=2 ttl=60 time=11.3 ms

64 bytes from 151.101.0.81 (151.101.0.81): icmp_seq=3 ttl=60 time=11.2 ms

64 bytes from 151.101.0.81 (151.101.0.81): icmp_seq=4 ttl=60 time=11.2 ms

64 bytes from 151.101.0.81 (151.101.0.81): icmp_seq=5 ttl=60 time=11.3 ms

64 bytes from 151.101.0.81 (151.101.0.81): icmp_seq=6 ttl=60 time=11.2 ms

64 bytes from 151.101.0.81 (151.101.0.81): icmp_seq=7 ttl=60 time=11.3 ms

64 bytes from 151.101.0.81 (151.101.0.81): icmp_seq=8 ttl=60 time=11.3 ms

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Re: Fibre connection dropping... Any thoughts?


@jamesn123 wrote:

Strange that none of the online tools i've used have reported any jitter... The error correction would make sense though and fits in with the current issue


That's because of most of the sites being the idiot guides, for professional we measure jitter as well for detecting errors. Smiley Wink

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Re: Fibre connection dropping... Any thoughts?

Ah yes I see the difference there. The worrying thing there is that the ping has always been very similar to the example I sent you before...

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Re: Fibre connection dropping... Any thoughts?

@jamesn123

 

Windows is slightly different because of its use of large resources but the latency varying by 2ms is too high even with Windows.  As an example 10ms to 12ms step after a step is too high jitter on Windows over ethernet.  1ms up and down with Windows is okay, stretching to 2ms is little concerning. Jitter tests are better done on *nix boxes, eg: Linux, MacOS, etc... There is a latency ping test on the router as well which would be better to use.

 

The jitter is also why the noise margin is going up and down like a yo-yo because that's what is happening and why the line is dropping.

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Re: Fibre connection dropping... Any thoughts?

I actually have a linux VM I could spin up to test it if needed. Although here is 4 sets of results from the Sky routers ping test for comparison, which look a lot worse. (The IP is bbc.co.uk)

 

PING 151.101.128.81 (151.101.128.81): 56 data bytes
64 bytes from 151.101.128.81: seq=0 ttl=61 time=12.402 ms
64 bytes from 151.101.128.81: seq=1 ttl=61 time=11.878 ms
64 bytes from 151.101.128.81: seq=2 ttl=61 time=11.793 ms
64 bytes from 151.101.128.81: seq=3 ttl=61 time=11.361 ms

--- 151.101.128.81 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 11.361/11.858/12.402 ms

 

PING 151.101.128.81 (151.101.128.81): 56 data bytes
64 bytes from 151.101.128.81: seq=0 ttl=61 time=11.621 ms
64 bytes from 151.101.128.81: seq=1 ttl=61 time=11.545 ms
64 bytes from 151.101.128.81: seq=2 ttl=61 time=12.051 ms
64 bytes from 151.101.128.81: seq=3 ttl=61 time=21.108 ms

--- 151.101.128.81 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 11.545/14.081/21.108 ms

 

PING 151.101.128.81 (151.101.128.81): 56 data bytes
64 bytes from 151.101.128.81: seq=0 ttl=61 time=13.935 ms
64 bytes from 151.101.128.81: seq=1 ttl=61 time=13.958 ms
64 bytes from 151.101.128.81: seq=2 ttl=61 time=14.527 ms
64 bytes from 151.101.128.81: seq=3 ttl=61 time=9.716 ms

--- 151.101.128.81 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 9.716/13.034/14.527 ms

 

PING 151.101.128.81 (151.101.128.81): 56 data bytes
64 bytes from 151.101.128.81: seq=0 ttl=61 time=12.365 ms
64 bytes from 151.101.128.81: seq=1 ttl=61 time=11.769 ms
64 bytes from 151.101.128.81: seq=2 ttl=61 time=12.021 ms
64 bytes from 151.101.128.81: seq=3 ttl=61 time=11.867 ms

--- 151.101.128.81 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 11.769/12.005/12.365 ms

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Re: Fibre connection dropping... Any thoughts?

@jamesn123

 

Don't use a VM that uses the resources of Windows and the VM.

 

With the latency tests that you've done on the router & Windows, it shows clearly high latency jitter and what is clearly happening to the line with reference to noise. So, those tests also confirm a slightly poor connection on the line to the cabinet with the additional information about line drops accordingly. And the reduced speed throughput additionally as well.

 

1. Reduced throughput.

2. High jitter on the line.

3. Line drops.

 

Conclusion and recommendation, fault on the line and Sky should be informed and a BT Openreach engineer booked to fix the fault.

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Re: Fibre connection dropping... Any thoughts?

Its on a VMware ESXI host Smiley Happy

 

I've been in contact with Sky and I was speechless when the adviser told me that my line was perfect, there were no drops and that it would only be considered as a fault if the connection dropped more than 15 times per day. 

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Re: Fibre connection dropping... Any thoughts?

@jamesn123

 

If they are stating such nonsense then a complaint is in order with Sky's complaint department with the factual information from the logs and information that has been provided.

 

15 times a day now that is absolutely bloody nonsense!

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Re: Fibre connection dropping... Any thoughts?

Your telling me, its madness. Been told my router hasnt recorded any drops in the last month which is impossible since it did a firmware upgrade last night which rebooted it.

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Re: Fibre connection dropping... Any thoughts?

Screenshot_20180601-220703.jpg

 

Screenshot_20180601-163834.jpg

 

These are the readings I keep getting and it jumps from one to the other but they keep trying to tell me that nothing is wrong from their end???


@jamesn123 wrote:

Hi all,

 

My fibre connection has been dropping around every 15mins for the last 24hrs or so. I've noticed the noise margin has decreased from the usual 6.1 to 4.8 and the speed has also gone up, it used to be dead on 75mbps but ever since the line started dropping its been up to 79/80mbps. Any ideas? I guess the lines become unstable due to a higher connection speed?

 

System Up Time: 145:20:06
PortStatusTxPktsRxPktsCollision PktsTx b/sRx b/sUp Time
WANMER151011847390209435148800:13:14
LANUp158128990102031837027502329858145:20:06
WLAN (2.4 GHz)Disable0000000:00:00
WLAN (5 GHz)Disable0000000:00:00
PLCDisable0000000:00:00

Broadband LinkDownstreamUpstream
Connection Speed79348 kbps19999 kbps
Line Attenuation18.3 dB0.0 dB
Noise Margin4.7 dB7.7 dB

 


 

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Re: Fibre connection dropping... Any thoughts?

@Beckster2310

 

Could you start a new thread with your issue explaining it in full detail? This thread is really reserved for the OP issue which is likely completely different to yours! Smiley Happy

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