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Forum Discussion

awitek's avatar
awitek
Aspirant
Jul 23, 2016

Xfinity Speed slow with C7000 and R8500 Nighthawk

My setup is a C7000 modem connected to a R8500 router, with the router setup as an AP.  I have Xfinity Blast! internet service at 150Mbps.  When running Xfinity speed test on a wired connection or th...
Troubleshooting
awitek's avatar
awitek
Aspirant
Jul 24, 2016

So I did the following:

 

  1. Disconnected the R8500 from the network.
  2. Run speed test with the wired connection to the C7000.  90 Mbps result.
  3. Factory reset the C7000.  Speed test result of 175 Mbps result.
  4. Reconnected the R8500 to the network.  Speed test result of 90 Mbps.
  5. Factory reset the R8500.  Speed test result 175 Mbps.  

Now the speed is good.  Anyone know why the factory reset would need to be done?  Anyways, thanks to all that read/replied.

TheEther's avatar
TheEther
Guru
Jul 24, 2016

Did you, perhaps, have QoS enabled?  QoS is useful for prioritizing traffic on slower Internet connections.  It's not very useful high speed connections such as yours.

  • awitek's avatar
    awitek
    Aspirant
    Jul 24, 2016

    Didn't have it enabled.