Very High Latency (Hayes)
 

This can't be right...

Noticed a bit more in the way of lag spikes whilst gaming so set up this monitor.

https://www.cableforum.co.uk/images/...2012/12/40.png

Downstream Channels
Lock Status Channel ID Frequency Modulation Rx Power SNR Pre RS Errors Post RS Errors
Locked 54 307000000 Hz QAM256 4.9 dBmV 41.9 dB 64116 0
Locked 49 267000000 Hz QAM256 4.2 dBmV 41.9 dB 160793 26
Locked 50 275000000 Hz QAM256 4.6 dBmV 41.6 dB 244464 32
Locked 51 283000000 Hz QAM256 4.4 dBmV 41.4 dB 161643 22
Locked 52 291000000 Hz QAM256 3.5 dBmV 40.4 dB 191164 23
Locked 53 299000000 Hz QAM256 5.0 dBmV 40.9 dB 181343 0
Unlocked Unknown 0 Hz Unknown 0.0 dBmV 0.0 dB Unknown Unknown
Unlocked Unknown 0 Hz Unknown 0.0 dBmV 0.0 dB Unknown Unknown


Upstream Channels
Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate
Locked 7 45800000 Hz ATDMA 58.0 dBmV 16QAM 6400000 20480 Kbits/sec
Unlocked 0 0 Hz Unknown 0.0 dBmV Unknown Unknown 0 Kbits/sec
Unlocked 0 0 Hz Unknown 0.0 dBmV Unknown Unknown 0 Kbits/sec
Unlocked 0 0 Hz Unknown 0.0 dBmV Unknown Unknown 0 Kbits/sec


Started a couple of weeks ago. Any help would be appreciated.

Edit: Just performed a reset by powering off the modem for 15minutes (hence the red bar at the right had side)

Re: Very High Latency (Hayes)
 

that looks a mess but in my opinion is a fault rather than utilisation related.

Re: Very High Latency (Hayes)
 

Never seen a graph like that before, something seriously wrong.

Can't blame the Croydon network for this one though!

Re: Very High Latency (Hayes)
 

Sigh called up support, Indian support. First guy that took the call couldn't understand what latency means. Still on the phone with them.

Edit : He finally understood it as 'ping' :P Claims it's due to over utilisation. Not buying it so waiting for a supervisor now.

Re: Very High Latency (Hayes)
 

i had this problem. a reboot sorted it. new upstream channel. talking of upstream, your power level for UP is high. you need a tech out to move you at the cab.

Re: Very High Latency (Hayes)
 

Spoke to the supervisor who kept insisting it was an over utilisation issue. He did correctly say from his readings that the problem occurs after 11:30am (and yes it does get worse then), however he was unable to explain the spikes between midnight and 11:30am so opened up a fault request and gave me a number.

He never asked about the Upstream power levels.

A reboot did help but I don't think it's going to last. I'll poke them again soon if it's not resolved and this time mention my UP power levels.

Re: Very High Latency (Hayes)
 

Looking at his graph he rebooted already and the problem went away already...

Re: Very High Latency (Hayes)
 

whys this has been happening recently qas?

Re: Very High Latency (Hayes)
 

the possibilities are there is 'also' high utilisation and thats making them misdiagnose.

also my diagnosis could have been wrong :)

did you take a note if your US channel changed after the reboot? if it didnt then this is either a modem issue (superhub) or a fault which the symptons go away after a recconect.

Re: Very High Latency (Hayes)
 

The issue appears to be better now after the reboot. However I did a reboot a week ago and then a couple of days later same old story with latency shooting up to the 150ms region.

Leaving from work now, when I get home I'll post the Upstream details again as well as graphs from the previous reboot.

Re: Very High Latency (Hayes)
 

You need a tech out to get that upstream power level sorted before you worry about anything else.

151 from a VM phoneline and settle for nothing less than a tech to correct your out of spec power level.

Re: Very High Latency (Hayes)
 

Here are the readings after the reboot yesterday :

Downstream Channels
Lock Status Channel ID Frequency Modulation Rx Power SNR Pre RS Errors Post RS Errors
Locked 54 307000000 Hz QAM256 5.1 dBmV 42.4 dB 9296 0
Locked 49 267000000 Hz QAM256 4.5 dBmV 42.5 dB 8548 0
Locked 50 275000000 Hz QAM256 4.7 dBmV 42.4 dB 8120 12
Locked 51 283000000 Hz QAM256 4.5 dBmV 42.0 dB 11289 0
Locked 52 291000000 Hz QAM256 3.6 dBmV 41.4 dB 19208 0
Locked 53 299000000 Hz QAM256 5.0 dBmV 41.9 dB 11942 0
Unlocked Unknown 0 Hz Unknown 0.0 dBmV 0.0 dB Unknown Unknown
Unlocked Unknown 0 Hz Unknown 0.0 dBmV 0.0 dB Unknown Unknown
Upstream Channels
Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate
Locked 7 45800000 Hz ATDMA 58.0 dBmV 16QAM 6400000 20480 Kbits/sec
Unlocked 0 0 Hz Unknown 0.0 dBmV Unknown Unknown 0 Kbits/sec
Unlocked 0 0 Hz Unknown 0.0 dBmV Unknown Unknown 0 Kbits/sec
Unlocked 0 0 Hz Unknown 0.0 dBmV Unknown Unknown 0 Kbits/sec


I spoke to tech support again. They say it's a fault in the area with a resolution time of one week (should be fixed on the 20th). Even if she was to book a tech to come out it would automatically be cancelled since this was flagged as an area fault.

As you can see on the Live Graph it's starting to get bad again.

Guess I have to wait a week :(

Re: Very High Latency (Hayes)
 

Live graph just shows moderate utilization issues. I've seen far worse (though less so recently).

But as mentioned above, your upstream power is too high, indicating some sort of physical impairment somewhere along your line.

Re: Very High Latency (Hayes)
 

Qasi is absolutely right as was The Installer.

Your SH is maxing out on upstream power and is just about getting through. Actually if it wasn't always getting through, your Network Log would show T3 errors. Does it?

Upstream faults are always tricky to diagnose and fix. It could be in the optical node; it could be a coax section that needs replacing; or a demodulator.

Re: Very High Latency (Hayes)
 

Still no engineer sent out. Just phoned tech support (because they said it would be resolved by 20th Dec) and they said it might be another 30-45 days more before an engineer can be sent out to resolve the high utilisation issue. Until that happens they cannot send any engineer out to look at the high upstream issue because their system prevents an engineer to be booked for a property where there is local fault already being looked at.

Worse still I am not getting 100% packet loss for about 15-20 mins 10-20 times a day. So it's gotten worse.

Any way to escalate this because this takes the ****? Not prepared to wait two months for someone to come resolve an high upstream power issue.