I upgraded my internet service with WoW! three days ago from 100Mbs to 500Mbs. I have not been able to get over a download speed of 120Mbs and upload speed of 24Mbs. They are unsure why this is happening and so am I. I do not know where in my setting to make the router and modem receive the 500Mbs. Any help and knowledge is greatly appreciated.

You can try a new modem for sure and see if these are seen on the new modem. If they are then the ISP needs to review there service line and signals UP to the modem. If the problem is not seen on the new modem then the CM600 could be faulty.

I'd also check the line carefully. Move the modem to right where the coax enters the home to prevent wiring in the home being the issue. The docsresets are issued from the cmts usually. And t3 tends to indicate line issues. not saying somethings not wrong with the modem but those errors tend to be line issues

Test it first directly connected to the modem with a pc/laptop. its pointless to troubleshoot a router if the modem is the issues. So what speeds do you get directly off the modem? what speeds does wow rate the CM600 for their service? (its different for each isp)

I did test directly from the modem on a laptop, it was 35Mbs download and 24Mbs upload, I also have tested from a desktop connected to a repeater that is plugged into the wall outlet, the last time I tested that it was 90Mbs download and 13Mbs upload. It has been as high as 130Mbs download and 24Mbs upload. The people from WoW that I have spoken to have all said that the modem should be able to handle 600Mbs.

do you have a screen snip of the modems cable connection page and its logs?

Unable to reach 500Mbs using Netgear CM600 cable modem and R6400v2 router with WoW! internet

17 Replies

plemans
Guru - Experienced User
Jul 27, 2021
Test it first directly connected to the modem with a pc/laptop. its pointless to troubleshoot a router if the modem is the issues.
So what speeds do you get directly off the modem?
what speeds does wow rate the CM600 for their service? (its different for each isp)
- jredmann
  Aspirant
  Jul 27, 2021
  I did test directly from the modem on a laptop, it was 35Mbs download and 24Mbs upload, I also have tested from a desktop connected to a repeater that is plugged into the wall outlet, the last time I tested that it was 90Mbs download and 13Mbs upload. It has been as high as 130Mbs download and 24Mbs upload. The people from WoW that I have spoken to have all said that the modem should be able to handle 600Mbs.
  - plemans
    Guru - Experienced User
    Jul 27, 2021
    do you have a screen snip of the modems cable connection page and its logs?

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Unable to reach 500Mbs using Netgear CM600 cable modem and R6400v2 router with WoW! internet