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erricz's avatar
erricz
Aspirant
Nov 19, 2019
Solved

CM600 WAN port will only negotiate 100M/Full

CM600  Hardware Version 1.01B Firmware Version V1.01.18   Very recently I started getting slow download speeds (10MB/s vs 50MB/s on Steam). Opened a ticket with Comcast, they've had multiple tech...
  • FURRYe38's avatar
    FURRYe38
    Nov 21, 2019

    IF the modems been reset and you've tired different cables. Sounds like the WAN port is faulty and the modem probably needs to be replaced. 

FURRYe38's avatar
FURRYe38
Guru - Experienced User
Nov 21, 2019

IF the modems been reset and you've tired different cables. Sounds like the WAN port is faulty and the modem probably needs to be replaced. 

  • erricz's avatar
    erricz
    Aspirant
    Nov 21, 2019

    Agreed, the new CM700 is performing flawlessly so far and I'm getting 700+Mbps right now. My upstream is pretty crap though (18Mbps) so I'll still need another service call.

     

    • FURRYe38's avatar
      FURRYe38
      Guru - Experienced User
      Nov 21, 2019

      Good to hear the new modem is working. 


      Ensure there are no cable line splitters in between the modem and ISP service box. 

      Please mark your thread as solved so others will know. 

       

      Enjoy. :smileywink:

      • erricz's avatar
        erricz
        Aspirant
        Nov 21, 2019

        Seems like 600Mbps service only gets 15Mbps upstream as per support. So my 18 is better than expected. Great, I'll accept reaplce modem as a solution. :)