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Bagz86
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Drop outs

Hi all,

Broadband been fine for ages, since I got cable swapped to house.

This week, complete drop out and needing to restart hub. happened 5 times since yesterday. 

Using hub in modem mode, wireless and other networks continue working. 
Router says ISP not providing a DHCP address.
192.168.100.1 stops responding.

Only fix is to reboot hub, but that doesn’t always bring it back.

Rang VM yesterday, and they did the usual troubleshooting, ‘sending signals down the line’ and resets etc.

Dropped again today for 20mins or so, reset didn’t bring it back even in Router mode. 

I’ve got a technician booked for Tuesday, given the last time intermittent issues I think it’s going to be tricky finding the fault.

Is there anything obvious in the logs?

Downstream bonded channelsChannel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
13310000008.540256 qam25
22030000006.540256 qam9
32110000006.640256 qam10
42190000006.940256 qam11
52270000006.840256 qam12
62350000006.940256 qam13
7243000000740256 qam14
8251000000740256 qam15
9259000000740256 qam16
102670000007.540256 qam17
112750000007.540256 qam18
122830000007.640256 qam19
132910000007.840256 qam20
142990000008.440256 qam21
153070000008.440256 qam22
163150000008.440256 qam23
173230000008.440256 qam24
18371000000940256 qam26
193790000008.840256 qam27
203870000008.840256 qam28
213950000008.840256 qam29
224030000008.940256 qam30
234110000009.140256 qam31
244190000009.140256 qam32


Downstream bonded channelsChannel Locked Status RxMER (dB) Pre RS Errors   Post RS Errors
1Locked40.95 0
2Locked40.919 0
3Locked40.36 0
4Locked40.38 0
5Locked40.37 0
6Locked40.36 0
7Locked40.99 0
8Locked40.96 0
9Locked40.35 0
10Locked40.38 0
11Locked40.38 0
12Locked40.34 0
13Locked40.37 0
14Locked40.95 0
15Locked40.97 0
16Locked40.39 0
17Locked40.310 0
18Locked40.36 0
19Locked40.38 0
20Locked40.34 0
21Locked40.96 0
22Locked40.98 0
23Locked40.98 0
24Locked40.313 0

 

Error log has some DHCP Renew warnings, No ranging response received. They don’t seem to align with the drop outs. 

I’m going to set up a BQM again and monitor too. 

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Bagz86
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Re: Drop outs

Upstream bonded channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

14620000046512064 qam1
22580000645.7512016 qam4
33939992746512064 qam2
43260015145.8512064 qam3



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000

 

General Configuration
Network access
Allowed
Maximum Number of CPEs
1
Baseline Privacy
Enabled
DOCSIS Mode
Docsis30
Config file
cmreg-vmdg505-bbt062-b.cm


Primary Downstream Service Flow
SFID447006
Max Traffic Rate402500089
Max Traffic Burst42600
Min Traffic Rate0


Primary Upstream Service Flow
SFID447005
Max Traffic Rate38500089
Max Traffic Burst42600
Min Traffic Rate0
Max Concatenated Burst42600
Scheduling TypeBestEffort

 

 

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Bagz86
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Re: Drop outs

BQM been running overnight. Some dropped packets noticed, 

 

latency seems high

BQM 

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tehwolf
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Re: Drop outs

one of your four upstream channels is at 16 - should be 64.. not sure that explains the 20 minute dropouts.. maybe there;s also an issue with the hub itself - engineer might replace it on Tuesday i guess.. 

rest of the stats look ok to me

Bagz86
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Re: Drop outs

I had a VM person booked to come and look at this, but then they rescheduled to a day I couldn't do, so I cancelled it, mostly because the drop outs hadn't been noticeable over the a couple of days. 

 

However, I've had a few more this week and my stats look similar to last time although, now all my upstreams are 16. 

I already have a 3db attenuator on my hub, my cabinet is very close, it's practically outside my house. 

I've tried calling VM but being on hold for ages and then run out of time. The thought of having to jump through all the same troubleshooting hoops puts me right off. 

Current stats are below, but whats the best way to get this looked at? Is it only through the call centres?

Downstream bonded channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

13310000008.340256 qam25
22030000006.540256 qam9
32110000006.540256 qam10
42190000006.940256 qam11
52270000006.640256 qam12
62350000006.840256 qam13
72430000006.940256 qam14
8251000000740256 qam15
9259000000740256 qam16
102670000007.440256 qam17
112750000007.540256 qam18
122830000007.540256 qam19
132910000007.640256 qam20
142990000008.340256 qam21
153070000008.340256 qam22
163150000008.340256 qam23
173230000008.340256 qam24
183710000008.940256 qam26
193790000008.840256 qam27
203870000008.840256 qam28
213950000008.840256 qam29
224030000008.840256 qam30
234110000009.140256 qam31
244190000009.140256 qam32



Downstream bonded channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1Locked40.900
2Locked40.350
3Locked40.350
4Locked40.360
5Locked40.340
6Locked40.360
7Locked40.360
8Locked40.330
9Locked40.310
10Locked40.340
11Locked40.950
12Locked40.340
13Locked40.350
14Locked40.340
15Locked40.950
16Locked40.340
17Locked40.950
18Locked40.300
19Locked40.340
20Locked40.340
21Locked40.360
22Locked40.330
23Locked40.970
24Locked40.370
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Bagz86
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Re: Drop outs

Upstream bonded channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

14619987346512016 qam1
22580019545.8512016 qam4
33940000045.8512016 qam2
43259962445.8512016 qam3



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000

 

 

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tehwolf
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Re: Drop outs

Forum staff here can arrange engineers - might take a few days for them to respond though, so depend how urgent it is.. quickest path is likely the phone..

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