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gdeglin's avatar
gdeglin
Aspirant
Oct 18, 2015

C3700 ipv4 speed 3x slower than ipv6 speed on comcast. Turning off WMM doesn't help.

I recently upgraded to a 150Mbps connection with Comcast.   After the upgrade, I see that my download speed is 50Mbps on ipv4, but 150Mbps on ipv6.     Searching online, I see that some user...
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vkdelta's avatar
vkdelta
NETGEAR Employee Retired
Oct 19, 2015

Hi, your screenshots show pretty close speeds.

 

Do you have another screenshot to show the difference?

gdeglin's avatar
gdeglin
Aspirant
Oct 19, 2015

Please look again, you'll see that the first screenshot shows the following

 

ipv4: 52.32Mbps

ipv6: 139.04Mbps 

 

These results have been very consistent across multiple speed test sites and over several days.

 

Thanks.

  • vkdelta's avatar
    vkdelta
    NETGEAR Employee Retired
    Oct 20, 2015

    for some reason those screenshots are showing. can you please post again?

     

    Can you please PM me your MAC address and the location as well and the speedtest server you are trying?

     

    also, what kind of laptop/NIC are you using?

     

    what FW are you running and I assuming ISP is comcast.

     

    this is kind of behaviour is very strange.

     

    can you please try other port on the device as well?

     

    • gdeglin's avatar
      gdeglin
      Aspirant
      Oct 30, 2015

      Sorry about the images, here it is:

      KS68TC5u4dDP_-rvOZEb4HtkBA4xUqGjWRsf3dZU3Kw.png

       

      I've received these same results on my iPhone 6, a Late 2013 iMac running OS X Yosemite, that same iMac running Windows 7 through Boot Camp, and a Mid-2011 Macbook Air.

       

      Firmware version V2.02.06 with Comcast. 

       

      This issue only happens on Wireless. Switching to a direct ethernet connection resolves the problem.

       

      PMing you the additional details now.

      • carl321's avatar
        carl321
        Star
        Nov 03, 2015

        PROBLEM SOLVED !

         

        As you may have seen ive been having alot of issues with this device. The solution is DONT BUY this device if you are with COMCAST !. Here is why:

         

        1. Slow speeds on wifi were due to an out dated firware version on the device according to NETGEAR (Tier 3 agent at the HQ in California) 

        2. After a FCC complaint that I filed; someone from Corp office at COMCAST called me. HE checked with his senior engineers and said that COMCAST does not have the latest firmware for the netgear device. He accepted that the firmware is completely handled (updated) by COMCAST and not NETGEAR (for the first time)

        3. So basically dont use this device on COMCAST and if you want to but your own device in the future please check the compatible device which have been tested and passed with a 3 star rating at COMCAST website. link : http://mydeviceinfo.comcast.net

         

        Make:  Netgear
        Model:  C3700-100NAS (Retail)
        Retail:  Yes
        Device Type:  Gateway
        DOCSIS Version:  3.0
        End of Life?  No
        Certification:  

         certification should have 3 stars according to COMCAST for that device to have the latest firmware on it !

         

        If you look carefully on this list Netgear device is not properly tested at COMCAST and they will not be doing anything in the near future. However Motorola / ARRIS devices are fuly supported by COMCAST (becasuse they own 10-15% of ARRIS :D ) 

         

        Sadly ARRIS devices arent the best and their wifi signal strength is absurb compared to some other providers. 

        ---------

        I bought a Airport express router for $85 on amazon and this has fixed all my wifi issues. (thank you Apple)

        Basically im using a $150 device as just a dumb modem :(

        Only if I knew about this corporate mumbo jumbo earlier. God Bless America !