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cerulean
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Consistently High Maximum Latency

Hi all,

Could someone please have a look at my BQM and tell me if this is normal or if there seems to be some kind of issue with the connection? Other user's graphs seem to look a lot more healthier with a lot less yellow.

Why is the maximum latency so high but average seems to be 'normal'?

BQMBQM

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Message 21 of 21
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Re: Consistently High Maximum Latency

No problem cerulean!

 

The level mentioned would indeed be within acceptable range.

 

Generally anything below 31 dBmV and above 55 dBmV will cause connection problems.

 

The account is currently displaying an upstream power level of 0 dBmV, however, this inconsistency in relation to the level mentioned, could indicate an error with the readings generated on our end.

 

It may be worth monitoring your connection and updating us should anything change.

 

Many thanks,

 

Nat.


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Message 2 of 21
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Re: Consistently High Maximum Latency

Hi there cerulean,

 

Very sorry to hear about the connection issue experienced.

 

I've located your account and I can see a lot of level issues present with the equipment, particularly the power levels.

 

I'd like to arrange for an engineer to come out and take a look at these.

 

I've sent you a private message so that we can sort this.

 

Speak to you soon,

 

Nat_J


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Sephiroth
Alessandro Volta
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Message 3 of 21
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Re: Consistently High Maximum Latency

I'll explain Nat's reply for you.

If the circuit is struggling for whatever reason, the BQM pings will have a higher proportion of them taking longer to turn round. When there are more long round trip times, the average ping (blue) rises. So in your graph, the denser yellow is backed up, so to say, by thicker blue.

Hope that makes sense.

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

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Message 4 of 21
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Re: Consistently High Maximum Latency

Thanks for your help with this Sephiroth! Smiley Happy

 

Nat.


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cerulean
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Re: Consistently High Maximum Latency

Thank you both for your help with this.

So I've had an engineer come over yesterday and change the hub 3 to a black one.

It updated to 9.1.116V and I changed it to modem mode (the whole configuration would have been the same as the previous one) and I was expecting to see a change in the BQM. It was running for almost a day now but I still don't see any change:

4feb3d2436b95d1a91af60932043572b-22-11-2016

 

Any ideas?

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Sephiroth
Alessandro Volta
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Re: Consistently High Maximum Latency

Did the technician check your power stats?

Anyway, can you post them so we can see if there's anything still there that NAT spotted.

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

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Message 7 of 21
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Re: Consistently High Maximum Latency

Hi Seph,

The technician said that the power levels were too high with the previous hub but said it's okay with the new one.

Here's the data:

Down:

ChannelFrequency(Hz)Power(dBmV)SNR(dB)ModulationChannel ID
12990000001.738.9256 qam17
23230000001.538.6256 qam20
33150000001.738.9256 qam19
43070000001.738.6256 qam18
52910000001.538.6256 qam16
62830000001.538.6256 qam15
7275000000138.6256 qam14
8267000000138.6256 qam13
92590000000.938.6256 qam12
102510000000.938.6256 qam11
11243000000138.6256 qam10
12235000000138.6256 qam9
132270000001.438.6256 qam8
142190000001.538.6256 qam7
152110000001.738.6256 qam6
162030000001.938.9256 qam5
171950000002.238.6256 qam4
181870000002.538.6256 qam3
191790000002.538.6256 qam2
201710000002.738.6256 qam1



 

Up:

Channel IDFrequency(Hz)ModePower(dBmV)Modulation ChannelBandwidth(Hz)Symbol Rate (ksps)
2239400000ATDMA39.864 qam64000005120
2146200000ATDMA39.864 qam64000005120
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cerulean
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Message 8 of 21
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Re: Consistently High Maximum Latency

From what I understand, these are acceptable levels?

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Sephiroth
Alessandro Volta
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Re: Consistently High Maximum Latency

Downstream - certainly OK.

Upstream, just check that the power level isn't moving because an x.8 number means it might be. If it's moving upward, then there might be an impairment to explain the BQM latency, which also shows the occasional lost packet.

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

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legacy1
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Message 10 of 21
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Re: Consistently High Maximum Latency

A small test of something you can try get this tool.
http://www.softpedia.com/get/Network-Tools/Network-Monitoring/Free-IP-Tools.shtml
on ping setting put in
IP 194.168.8.100
Pkts: 0
Delay ms: 50
Pkt size: 16
and start and leave for 1 hour to see your BQM shows any better.

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