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My Arris SB8200 Showing Green Downstream light all of a sudden

puch96
Frequent Visitor

My Arris SB8200 Showing Green Downstream light all of a sudden

All,

Yesterday I noticed that all my modem lights are green (including my downstream light).

Before, downstream light used to be blue (suggesting that it was connected to DOCSIS 3.1.

 

I'm not sure why all of a sudden it shows green light.  I try re-starting the modem. When it restarts, downstream light will show blue, but will only last for about 2 to 5 minutes, then reverts back to green light.

I have XTREME Pro service with up to 600MB/s down.  I do not have any issues with download and upload speeds as I get consistent around 700 UP and 23 DOWN.

 

Any suggestions as to why my modem does not show the blue downstream light anymore?

Gambit66
Problem Solver

Re: My Arris SB8200 Showing Green Downstream light all of a sudden


@puch96 wrote:

All,

Yesterday I noticed that all my modem lights are green (including my downstream light).

Before, downstream light used to be blue (suggesting that it was connected to DOCSIS 3.1.

 

I'm not sure why all of a sudden it shows green light.  I try re-starting the modem. When it restarts, downstream light will show blue, but will only last for about 2 to 5 minutes, then reverts back to green light.

I have XTREME Pro service with up to 600MB/s down.  I do not have any issues with download and upload speeds as I get consistent around 700 UP and 23 DOWN.

 

Any suggestions as to why my modem does not show the blue downstream light anymore?


Blue is DOCSIS 3.1, Green is DOCSIS 3.0 I believe. If its working, let it bump!

puch96
Frequent Visitor

Re: My Arris SB8200 Showing Green Downstream light all of a sudden

Yes. I know. Buy I am wondering if anyone knows why it went from blue to green since yesterday.
EG
Expert

Re: My Arris SB8200 Showing Green Downstream light all of a sudden

What do the modem's signal stats look like ? Try getting them here; http://192.168.100.1

Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.




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puch96
Frequent Visitor

Re: My Arris SB8200 Showing Green Downstream light all of a sudden

Downstream Bonded Channels
Channel IDLock StatusModulationFrequencyPowerSNR/MERCorrectedUncorrectables
42LockedQAM256405000000 Hz2.0 dBmV41.1 dB00
1LockedQAM256483000000 Hz1.5 dBmV41.1 dB00
2LockedQAM256489000000 Hz1.4 dBmV41.1 dB00
3LockedQAM256495000000 Hz1.5 dBmV41.2 dB00
4LockedQAM256501000000 Hz1.5 dBmV41.1 dB00
5LockedQAM256507000000 Hz1.2 dBmV41.1 dB00
6LockedQAM256513000000 Hz1.1 dBmV41.0 dB00
7LockedQAM256519000000 Hz0.8 dBmV41.0 dB00
8LockedQAM256525000000 Hz0.8 dBmV41.0 dB00
9LockedQAM256531000000 Hz0.9 dBmV41.0 dB00
10LockedQAM256537000000 Hz0.8 dBmV40.9 dB00
11LockedQAM256543000000 Hz0.7 dBmV40.9 dB00
12LockedQAM256549000000 Hz0.5 dBmV40.8 dB00
13LockedQAM256555000000 Hz0.5 dBmV40.7 dB00
14LockedQAM256561000000 Hz0.5 dBmV40.8 dB00
15LockedQAM256567000000 Hz0.4 dBmV40.6 dB00
16LockedQAM256573000000 Hz0.2 dBmV40.6 dB00
17LockedQAM256579000000 Hz0.0 dBmV40.6 dB00
18LockedQAM256585000000 Hz-0.4 dBmV40.5 dB00
19LockedQAM256591000000 Hz-0.6 dBmV40.4 dB00
33LockedQAM256459000000 Hz1.2 dBmV41.0 dB00
34LockedQAM256465000000 Hz1.4 dBmV41.1 dB00
35LockedQAM256471000000 Hz1.5 dBmV41.1 dB00
36LockedQAM256477000000 Hz1.6 dBmV41.1 dB00
37LockedOther690000000 Hz1.1 dBmV39.2 dB52968621421
38Not LockedQAM2560 Hz0.0 dBmV41.1 dB00
39LockedQAM256435000000 Hz1.8 dBmV41.3 dB00
40LockedQAM256441000000 Hz1.7 dBmV41.1 dB00
41LockedQAM256447000000 Hz1.3 dBmV41.1 dB00
43LockedQAM256453000000 Hz1.3 dBmV41.3 dB00
44LockedQAM256411000000 Hz2.1 dBmV41.3 dB00
45LockedQAM256417000000 Hz2.1 dBmV41.0 dB00


 

 
Upstream Bonded Channels
ChannelChannel IDLock StatusUS Channel TypeFrequencyWidthPower
11LockedSC-QAM Upstream35600000 Hz6400000 Hz45.0 dBmV
22LockedSC-QAM Upstream29200000 Hz6400000 Hz44.0 dBmV
33LockedSC-QAM Upstream22800000 Hz6400000 Hz44.0 dBmV
44LockedSC-QAM Upstream16400000 Hz6400000 Hz43.0 dBmV
55LockedSC-QAM Upstream40400000 Hz3200000 Hz44.0 dBmV


 

 

Current System Time: Wed Jan 27 10:57:30 2021

EG
Expert

Re: My Arris SB8200 Showing Green Downstream light all of a sudden

Hmmm... That's strange because the DOCSIS 3.1 channel shown below is indeed locked in. It should remain being blue. Perhaps it's just a glitch.

 

37LockedOther690000000 Hz1.1 dBmV39.2 dB52968621421


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puch96
Frequent Visitor

Re: My Arris SB8200 Showing Green Downstream light all of a sudden

Yes. That is strange.  I rebooted the modem again and the blue downstream came back on and it stayed on so far........

I'll keep watching it...

Maybe Comcast was performing some service updates in my area or something....??.......

puch96
Frequent Visitor

Re: My Arris SB8200 Showing Green Downstream light all of a sudden

hmmm... I just noticed my downstream light went back to green... 

EG
Expert

Re: My Arris SB8200 Showing Green Downstream light all of a sudden

I wouldn't sweat it as long as everything is working properly and that *Other* DOCSIS 3.1 channel is being shown as "locked". 



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sgbradley
New Poster

Re: My Arris SB8200 Showing Green Downstream light all of a sudden

I have the same situation, the data transfer speeds are fine, after rebooting the modem the downstream is blue and then it turns green. I’d like to know what Comcast changed and why. This was a recent change. I plan to talk to me of their service technicians when I see one in the field (a real one, not an install contractor) and try to get a real answer. I know phone technical support from the Philippines or wherever won’t be any help.
andyross
Silver Problem Solver

Re: My Arris SB8200 Showing Green Downstream light all of a sudden

Comcast started rolling out a firmware update around Jan 26 or so. Some reported an odd error in the event log. It's possible the green light may be a new bug telling you it either has lost OFDM data, or briefly lost it but forgot to reset the light.

https://www.dslreports.com/forum/r33014606-Firmware-Config-File-Rejected

Nobbler
New Poster

Re: My Arris SB8200 Showing Green Downstream light all of a sudden

It is indeed buggy. If I loosen the coax to the point of creating errors, the light turns blue again and stays that way until it decides it's easier being green.