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Sakuuu
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No Ranging Response received

Hi All, 

I have noted I have quite a few drops, see the "No Ranging Response received" below from the logs:

 

etwork Log

Time Priority Description

13/01/2021 16:22:26noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/01/2021 16:22:3Warning!LAN login FAILED : Incorrect Username / Password / ConnectionType;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/01/2021 03:11:27criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/01/2021 01:21:9noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/01/2021 13:20:21criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/01/2021 12:43:56noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/01/1970 00:01:37criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/01/2021 00:04:15noticeSW download Successful - Via NMS
11/01/2021 00:00:38noticeSW Download INIT - Via NMS
10/01/2021 03:36:47criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
10/01/2021 03:19:37ErrorDHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/01/2021 21:08:42criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/01/2021 21:00:58noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/01/2021 20:57:31Warning!LAN login FAILED : Incorrect Username / Password / ConnectionType;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/01/2021 17:48:55criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/01/2021 16:22:19Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/01/2021 16:21:29criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/01/2021 15:50:22Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
06/01/2021 18:03:18criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
06/01/2021 17:40:8noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

 

I have looked and power / SNR levels seem ok to me, both up and down, but please comment if they seem off:

 

Downstream:

ownstream bonded channels

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

1266750000038256 qam17
21387500001.237256 qam1
31467500001.537256 qam2
41547500001.537256 qam3
51627500001.237256 qam4
61707500001.737256 qam5
71787500001.538256 qam6
81867500001.437256 qam7
9194750000138256 qam8
102027500000.937256 qam9
112107500000.537256 qam10
122187500000.937256 qam11
132267500000.537256 qam12
142347500000.537256 qam13
152427500000.237256 qam14
16250750000038256 qam15
172587500000.238256 qam16
18274750000037256 qam18
192827500000.238256 qam19
20290750000037256 qam20
212987500000.437256 qam21
22306750000037256 qam22
233147500000.438256 qam23
24322750000037256 qam24

 

Upstream

Upstream bonded channels

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

13259991649.5512016 qam5
24620000449.3512016 qam3
33939979549512016 qam4
42579994749.3512016 qam

6

 

I guess what stands out is the modulation at 16 qam, on all four channels, obviously it would usually be 64, or even 32 (not ideal), but the drop to 16 on all 4 channels is concerning, and is service impacting, in that my router keeps freezing and requiring reboot and also streaming video via upload is impacted greatly. 

Are you able to take a look at the stats and info overall and come back with suggestions? Also - how would I best proceed with an engineer etc as required?

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Z92
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Re: No Ranging Response received

Can you post the rest of the downstream channels? There should be another table below it with more data. 

 

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Sakuuu
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Re: No Ranging Response received

See below - modem has been up for approx 5 mins hence the ES are not much use, I will setup a Broadband Quality Monitor (BQM) also.    Downstream bonded channels

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

1Locked38.660
2Locked37.6690
3Locked37.6910
4Locked37.6710
5Locked37.6310
6Locked37.6410
7Locked38.6110
8Locked37.6190
9Locked38.630
10Locked37.6220
11Locked37.690
12Locked37.3390
13Locked37.680
14Locked37.690
15Locked37.670
16Locked38.610
17Locked38.660
18Locked37.670
19Locked38.660
20Locked37.640
21Locked37.6180
22Locked37.660
23Locked38.6200
24Locked37.620
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jk1990
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Re: No Ranging Response received

Once you have over 24hrs uptime can you repost the info above, so we can see ES overtime. 

Getting resolution for these sorts of issues is challenging, are you able to share BQM link also, please?

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