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Ali_barr
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High pre RS errors

Hi, get lag spikes in game. I think it may be something to do with my connection. DMZ, port forwarded. Looking at my downstream connection I get high pre RS errors. Can this be fixed would it cause lag spikes.
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Superuser
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Re: High pre RS errors

So we can help us to help you, can you

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.

Pre RS errors could cause a very small increase in lag if there was enough of them. But POST RS are the ones you want to watch for....

In either case its the rate of increase that is an issue, not the actual number...posting screen caps as above will give us some idea...

 


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Ali_barr
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Message 3 of 18
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Re: High pre RS errors

Super Hub
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Downstream
home
Router Status
Downstream
Downstream
DS-1 DS-2 DS-3 DS-4 DS-5 DS-6 DS-7 DS-8
Frequency (Hz) 275000000 267000000 283000000 291000000 299000000 307000000 315000000 323000000
Lock Status(QAM Lock/FEC Sync/MPEG Lock) Locked Locked Locked Locked Locked Locked Locked Locked
Channel ID 6 5 7 8 9 10 11 12
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) 0.80 0.83 0.68 0.47 0.18 0.05 0.21 0.37
RxMER (dB) 37.94 37.94 37.94 38.26 38.26 38.26 37.94 38.61
Pre RS Errors Reset Counter 3451 14844 1542 977 0 0 1 2
Post RS Errors Reset Counter 0 0 0 0 0 0 0 0

© 2010 Virgin Media. All rights reserved.
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Ali_barr
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Re: High pre RS errors

Super Hub
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Upstream
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Router Status
Upstream
Upstream
US-1 US-2 US-3 US-4
Channel Type 2.0 N/A N/A 2.0
Channel ID 33 N/A N/A 34
Frequency (Hz) 46200000 N/A N/A 39400000
Ranging Status Success Other Other Success
Modulation 16QAM N/A N/A 16QAM
Symbol Rate (Sym/sec) 5120000 N/A N/A 5120000
Mini-Slot Size 4 N/A N/A 4
Power Level (dBmV) 46.75 N/A N/A 46.25
T1 Timeouts 0 0 0 0
T2 Timeouts 0 0 0 0
T3 Timeouts 0 0 0 0
T4 Timeouts 0 0 0 0

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Ali_barr
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Re: High pre RS errors

Super Hub
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Network Log
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Router Status
Network Log
Network Log
First Time Last Time Priority Error Number Description
04/08/2016 20:56:16 GMT 04/08/2016 20:56:16 GMT Warning (5) 66050310 Auth Success - Web login successful.
03/08/2016 20:26:22 GMT 03/08/2016 20:26:22 GMT Error (4) 68010302 DHCP WAN IP - 81.99.5.166
03/08/2016 20:25:29 GMT 03/08/2016 20:25:29 GMT Error (4) 68000407 TOD established
Time Not Established Time Not Established Notice (6) 84000510 Downstream Locked Successfully
03/08/2016 20:19:13 GMT 03/08/2016 20:19:13 GMT Warning (5) 66050310 Auth Success - Web login successful.
03/08/2016 20:19:00 GMT 03/08/2016 20:19:00 GMT Warning (5) 66050310 Auth Success - Web login successful.
02/08/2016 22:05:30 GMT 02/08/2016 22:05:30 GMT Warning (5) 66050310 Auth Success - Web login successful.
02/08/2016 21:57:23 GMT 02/08/2016 21:57:23 GMT Warning (5) 66050310 Auth Success - Web login successful.
31/07/2016 22:55:17 GMT 31/07/2016 22:55:17 GMT Error (4) 68010302 DHCP WAN IP - 81.99.5.166
31/07/2016 22:54:26 GMT 31/07/2016 22:54:26 GMT Error (4) 68000407 TOD established
Time Not Established Time Not Established Notice (6) 84000510 Downstream Locked Successfully
31/07/2016 20:02:21 GMT 31/07/2016 20:02:21 GMT Warning (5) 66050310 Auth Success - Web login successful.
31/07/2016 20:02:06 GMT 31/07/2016 20:02:06 GMT Warning (5) 66050310 Auth Success - Web login successful.
31/07/2016 14:32:47 GMT 31/07/2016 14:32:47 GMT Warning (5) 66050310 Auth Success - Web login successful.
31/07/2016 14:21:52 GMT 31/07/2016 14:21:52 GMT Warning (5) 66050310 Auth Success - Web login successful.
31/07/2016 14:12:01 GMT 31/07/2016 14:12:01 GMT Warning (5) 66050310 Auth Success - Web login successful.
31/07/2016 14:05:03 GMT 31/07/2016 14:05:03 GMT Error (4) 68010302 DHCP WAN IP - 81.99.5.166
31/07/2016 14:04:10 GMT 31/07/2016 14:04:10 GMT Error (4) 68000407 TOD established
Time Not Established Time Not Established Notice (6) 84000510 Downstream Locked Successfully
31/07/2016 13:52:41 GMT 31/07/2016 13:52:41 GMT Warning (5) 66050310 Auth Success - Web login successful.
Refresh Clear Log

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Ali_barr
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Message 6 of 18
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Re: High pre RS errors

Hi kippies,

Let me know what you think. High Pre RS I think that was about 24 hours with 2 hours of gaming may be an hour of netflicks.

Thanks in advance.
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DABhand
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Message 7 of 18
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Re: High pre RS errors

You will get the usual answer of "because those a pre-RS errors those are fixed on the fly, and everything is working as intended" while they ignore the reality that they shouldn't be happening at all.

14kish for your 2nd channel isn't the highest I have seen. One time I had it in the millions and got the above answer.

Mine is around the same for the 2nd channel too, but I live far away from you so Smiley Tongue

Majide!
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Ali_barr
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Message 8 of 18
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Re: High pre RS errors

Kippies,
I feel that the router must be working harder when these errors happen. And leads to timing issues lag. Why is second channel more prone to them?
Two games of BO3 n I have 300 pre errors.
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Superuser
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Message 9 of 18
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Re: High pre RS errors

Its not so much the "extra strain" put on the router- packets have to go through error checking anyway, its more that it could be symptomatic of another issue.

As DabHand says, in an ideal world you wouldn't get ANY. VM will have their own limits for when to investigate. Best thing to do is wait for staff to pick it up and run some checks...In the meantime can you 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...

 

 

 

 


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Sephiroth
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Message 10 of 18
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Re: High pre RS errors


Ali_barr wrote:
Kippies,
I feel that the router must be working harder when these errors happen. And leads to timing issues lag. Why is second channel more prone to them?
Two games of BO3 n I have 300 pre errors.

You might be forgiven for thinking so.  But if you read up on how Reed Solomon works, you'll find out that this in-line circuitry with the anding, oring or noring of bits according to the nature of the discrepancy. I've simplified this but there is no delay or increase in latency with pre-RS errros when there are no post-RS errors.

 

Dabs says they shoudn't happen.  Most of then happen when the modem is rebooted, in the few moments when the modem is not synch'd and can't understand the data that comes streaming in.  Bear in mind everything on your node for everyone comes into your modem and in-line filtering masks a BPI+ value (established for your connection during the boot process) onto each symbol header and only allows data through that matches the BPI+ code.  There's millions hitting your modem all the time.  A few Pre-RS errors are inevitable and guaranteed during boot-up.

 

 

Seph - ( DEFROCKED - My advice is at your risk)