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Forum Discussion
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...
You didn't specify whether you are getting these results connected through the R8500 or the C7000. You should isolate the bottleneck. Check your cables. A speed test of 90 Mbps could be an indication that one of your Ethernet connections is running at 100 Mbps instead of 1000 Mbps.
So I did the following:
- Disconnected the R8500 from the network.
- Run speed test with the wired connection to the C7000. 90 Mbps result.
- Factory reset the C7000. Speed test result of 175 Mbps result.
- Reconnected the R8500 to the network. Speed test result of 90 Mbps.
- 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.
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.
Didn't have it enabled.
Now after having no speed issues the last few days, I ran the speed test and got a 90 Mbps result again. I didn't make any changes to the modem or router, and confirmed no issues/outages with Xfinity. I isolated the modem to find the bottleneck, but that returned a 90 Mpbs speed test result.
Could this be a hardware problem? Anyone have any ideas?
Did you check your cables?
What features have you enabled on the C7000? Traffic metering, site blocking, port forwarding, etc.?
Have you looked at the logs or the Cable Connection page on the C7000?