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Stealth57's avatar
Stealth57
Aspirant
Mar 25, 2022

R6900 Lan Ports Only Delivering 200mbps

I have Xfinity service at 600mbps.  I have a Nighthawk CM1100 modem that was tested in my house by Comcast at 660mbps, BUT any of the LAN (CAT5) ports on the R6900 are only delivering 200mbps. That was confirmed by Comcast tests and what I am seeing on a directly connected computer.

 

Is there a setting that could be limiting speeds?  I have three devices plugged into the LAN ports, VOIP phone, NAS, and Mac mini.  VOIP and NAS are only used occasionally.

 

Any help out be greatly appreciated.

4 Replies

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User
    Mar 26, 2022
    Stealth57 wrote:

    I have Xfinity service at 600mbps.  I have a Nighthawk CM1100 modem that was tested in my house by Comcast at 660mbps, BUT any of the LAN (CAT5) ports on the R6900 are only delivering 200mbps. CAT6 is recommended as CAT5 doesn't support 1000Mpbs speeds which is needed to see near 900Mpbs WAN to LAN speeds.

     

    That was confirmed by Comcast tests and what I am seeing on a directly connected computer.

     

    Is there a setting that could be limiting speeds?  I have three devices plugged into the LAN ports, VOIP phone, NAS, and Mac mini.  VOIP and NAS are only used occasionally.

     

    Try a factory reset on the router and setup from scratch. Power OFF the ISP modem for 1 minute then back ON. Walk thru the setup wizard on the router. Do not enable Access Controls, Armor, Circle, QoS or Traffic Meter. Run a speed test on a wired PC connected to the router using Ooklas installable speed test app for Windows or Mac. 

     

    • Stealth57's avatar
      Stealth57
      Aspirant
      Mar 27, 2022

      The factory reset cleared the issue with the LAN ports. I am now getting about 670mbps hardwired; however, the WiFi won't deliver more than 300mbps sitting right next to the router. I tested with an iPhone 12, Mac Powerbook, and a Dell running a dual antenna Intel chipset.  The AC1900 spec should provide up to 1,300mbps on a 5Ghz channel.  50 feet away the signal drops to 50mbps. That was the same I was getting when my Xfinity plan was only 60mbps.  All the Wireless settings are max and checking Meta Geek, I am on the least congested bands.

      • michaelkenward's avatar
        michaelkenward
        Guru - Experienced User
        Mar 28, 2022
        Stealth57 wrote:

        ..... the WiFi won't deliver more than 300mbps sitting right next to the router. I tested with an iPhone 12, Mac Powerbook, and a Dell running a dual antenna Intel chipset.  The AC1900 spec should provide up to 1,300mbps on a 5Ghz channel. 

        Maybe that's all your combination of wifi technologies can deliver. The R6900, a seven-year old design, isn't the fastest router on the block when it comes to wifi. 1300 Mbps sounds optimistic.

         

        Do you expect an Internet speed of 600 Mbps to deliver wifi speeds of more than twice that?

         

        It might be worth a bit of background reading.

         

        Understand Wi-Fi 4/5/6 (802.11 n/ac/ad/ax)

         

        @duckware knows their stuff and can bust a few myths and cut through marketing hype.

         

        Is the wifi slowing down things you are doing? Or are you just looking at speed tests? Are your wifi clients a lot faster with other wifi sources?