dixonjw's profile

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Monday, January 4th, 2021 4:00 PM

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MB8600 - slow gigabit (downstream only)

Hi, I have Xfinity Gigabit as part of my service plan.

 

My current hardware setup is:

Modem: Motorola MB8600

Router: Linksys EA6350

 

The issue: the downstream light on the MB8600 is blinking and I am getting a consistent 30Mbps down no matter what device I try, no matter whether I connect through Ethernet, 2.4Ghz, or 5Ghz, no matter if I connect directly to the modem and bypass the router. The last acceptable speeds were probably in the 400-500Mbps range just a couple of days ago. (I understand my router probably can't handle gigabit speeds but it definitely can handle more than 30 down.)

 

My upstream results are as expected, 40Mbps.

 

Things I have already tried:

Downstream Bonded Channels

 

 ChannelLock StatusModulationChannel IDFreq. (MHz)Pwr (dBmV)SNR (dB)CorrectedUncorrected
   1LockedQAM25641651.0-14.135.100
   2LockedQAM25613483.0-5.941.500
   3LockedQAM25614489.0-6.740.900
   4LockedQAM25615495.0-7.040.500
   5LockedQAM25616501.0-7.240.900
   6LockedQAM25617507.0-7.939.800
   7LockedQAM25618513.0-8.039.800
   8LockedQAM25619519.0-7.740.300
   9LockedQAM25620525.0-7.240.400
   10LockedQAM25621531.0-6.340.700
   11LockedQAM25622537.0-5.641.100
   12LockedQAM25623543.0-5.641.100
   13LockedQAM25624549.0-5.641.000
   14LockedQAM25625555.0-6.240.800
   15LockedQAM25626561.0-7.939.900
   16LockedQAM25627567.0-9.138.900
   17LockedQAM25628573.0-9.738.600
   18LockedQAM25629579.0-11.637.400
   19LockedQAM25630585.0-12.236.600
   20LockedQAM25631591.0-10.837.700
   21LockedQAM25632597.0-10.937.600
   22LockedQAM25633603.0-10.737.400
   23LockedQAM25634609.0-9.638.500
   24LockedQAM25635615.0-9.438.700
   25LockedQAM25636621.0-10.237.900
   26LockedQAM25637627.0-10.337.900
   27LockedQAM25638633.0-11.537.200
   28LockedQAM25639639.0-13.135.700
   29LockedQAM25640645.0-13.435.500
   30LockedQAM25642657.0-15.034.200
   31LockedQAM25643663.0-15.833.200
   32LockedQAM25644669.0-17.032.400
   33LockedOFDM PLC159690.0-29.50.0066

 

Upstream Bonded Channels

 

   ChannelLock StatusChannel TypeChannel IDSymb. Rate (Ksym/sec)Freq. (MHz)Pwr (dBmV)
   1LockedSC-QAM1512035.644.3
   2LockedSC-QAM2512029.244.3
   3LockedSC-QAM3512022.843.8
   4LockedSC-QAM4512016.442.8
   5LockedSC-QAM5128039.644.8

 

I had a tech out late last month due to this same issue. Any assistance would be greatly appreciated. Thanks!

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Accepted Solution

New Poster

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2 Messages

5 years ago

Update: tech came out and did an analysis, found water in the line from the pole to the outside box. He replaced the line and everything is fixed.

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