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djwilliams100
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High Jitter

What can be done to reduce the jitter im seeing?

 

 Capture.PNG

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Superuser
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Re: High Jitter

Depends...

Why are you worried about jitter to twitter? (hey that rhymes!)

Is it ACTUAL jitter or de-prioritising of ICMP? What symptoms are you seeing your end?

Whats your setup? Where are you running the test from? i.e a  PC wired direct to HUB? PC>router>hub in modem mode?

 


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djwilliams100
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Message 3 of 12
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Re: High Jitter

Ive been seeing some lag on xbox recently and after looking into it, Jitter could be bad for gaming so was advised to run PingPlotter to a website (i chose Twitter randomly) to see what i was getting. Im running this wired direct to my SH2

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Superuser
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Message 4 of 12
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Re: High Jitter

Okay so, whilst the priciple is sound, its a bit random to run it to a website you  just decided on, especially one that could well be using a CDN...

If you cant run it to the server you are using, set up a BQM

 

HERE

 

Run it for say 24 hrs, and post the result.

 

Dont forget youll need to make sure your super hub is configured to reply to ICMP echo requests...

 

BQM.jpg

 

 

 


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djwilliams100
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Re: High Jitter

Thanks for coming back to me. No one has been on the internet today (im still at work) 

 

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Superuser
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Re: High Jitter

Looks like you are seeing increased latency during peak periods, could be a case of overutilisation, could just be a busy segment- its not a huge increase - wait for staff to pick it up and confirm..

Is there just you using it , or are others using the net at the same time?

While we are at it can you post your power levels from your HUB when you get home?

Go to your Superhub Log in screen

Do NOT log in.

Little button top right.....


Can you post Upstream, Downstream and Network logs.



Screen caps are nice, C&P will do- Don't stress about formatting if you C&P. Someone will get a look and see if there's anything obvious amiss.

 


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legacy1
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Message 7 of 12
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Re: High Jitter

With a BQM like that for most of the day its likely not to be a Docsis link problem apart from the small bit that spiked around 10pm which might have been caused by a download or upload along with the available bandwidth being low as everyone else brings it down as the blue average goes up with yellow (not to be confused with blue average going down in to the green which is fine).

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djwilliams100
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Re: High Jitter

Downstream
DS-1 DS-2 DS-3 DS-4 DS-5 DS-6 DS-7 DS-8
Frequency (Hz) 266750000 274750000 282750000 290750000 298750000 306750000 314750000 322750000
Lock Status(QAM Lock/FEC Sync/MPEG Lock) Locked Locked Locked Locked Locked Locked Locked Locked
Channel ID 9 10 11 12 13 14 15 16
Modulation 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM
Symbol Rate (Msym/sec) 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level (dBmV) -0.57 -0.20 -0.08 0.18 0.32 0.37 0.37 0.34
RxMER (dB) 37.94 38.26 37.94 38.26 38.26 38.61 38.26 38.26
Pre RS Errors Reset Counter 1476 1083 1107 1177 304 1037 951 331
Post RS Errors Reset Counter 285 274 965 1003 299 1034 948 327

Upstream
US-1 US-2 US-3 US-4
Channel Type 2.0 N/A N/A 2.0
Channel ID 10 N/A N/A 12
Frequency (Hz) 39400000 N/A N/A 25800000
Ranging Status Success Other Other Success
Modulation 32QAM N/A N/A 32QAM
Symbol Rate (Sym/sec) 5120000 N/A N/A 5120000
Mini-Slot Size 4 N/A N/A 4
Power Level (dBmV) 46.00 N/A N/A 45.00
T1 Timeouts 0 0 0 0
T2 Timeouts 0 0 0 0
T3 Timeouts 0 0 0 0
T4 Timeouts 0 0 0 0

First Time Last Time Priority Error Number Description
12/08/2016 20:45:06 GMT 12/08/2016 20:45:06 GMT Error (4) 68000407 TOD established
Time Not Established Time Not Established Notice (6) 84000510 Downstream Locked Successfully
12/08/2016 20:16:25 GMT 12/08/2016 20:16:25 GMT Error (4) 68000407 TOD established
Time Not Established Time Not Established Notice (6) 84000510 Downstream Locked Successfully
12/08/2016 20:15:03 GMT 12/08/2016 20:15:03 GMT Warning (5) 66050310 Auth Success - Web login successful.
12/08/2016 07:14:14 GMT 12/08/2016 07:14:14 GMT Error (4) 68010400 DHCP REBIND WARNING - Field invalid in response
12/08/2016 07:13:21 GMT 12/08/2016 07:13:21 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
12/08/2016 07:12:30 GMT 12/08/2016 07:12:30 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
12/08/2016 07:10:48 GMT 12/08/2016 07:10:48 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
12/08/2016 07:07:25 GMT 12/08/2016 07:07:25 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
12/08/2016 07:00:39 GMT 12/08/2016 07:00:39 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
12/08/2016 06:47:06 GMT 12/08/2016 06:47:06 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
12/08/2016 06:20:00 GMT 12/08/2016 06:20:00 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
12/08/2016 05:25:50 GMT 12/08/2016 05:25:50 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
12/08/2016 03:37:30 GMT 12/08/2016 03:37:30 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
12/08/2016 00:00:47 GMT 12/08/2016 00:00:47 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
11/08/2016 16:47:23 GMT 11/08/2016 16:47:23 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
11/08/2016 02:20:37 GMT 11/08/2016 02:20:37 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
06/08/2016 18:20:45 GMT 06/08/2016 18:20:45 GMT Warning (5) 66050310 Auth Success - Web login successful.
06/08/2016 16:24:10 GMT 06/08/2016 16:24:10 GMT Error (4) 68010400 DHCP REBIND WARNING - Field invalid in response
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Superuser
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Message 9 of 12
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Re: High Jitter

Nothing jumping out there. SNR isnt great but its well within spec, power levels are text book.

Anything else going on on the connection whist gaming? Is the console wired?

 

 


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djwilliams100
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Message 10 of 12
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Re: High Jitter

Im mainly on the internet by myself. Sometimes my mrs will have spotify on and maybe Facebook but nothing intensive. 

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