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Forum Discussion

tslo's avatar
tslo
Aspirant
Oct 28, 2016
Solved

R7500 slow LAN speeds with Arris 6190 cable internet modem

I activated a new cable internet modem today and my LAN throughput, as measured via speedtest.net, dropped significantly   Internet Provider: Comcast, Tier: Performance Pro Setup: Arris SB6190 -- ...
6190
arris
comcast
Nighthawk
R7500
r7500v2
sb6190
Troubleshooting
  • tslo's avatar
    tslo
    Nov 04, 2016
    JamesGL wrote:

     

    I think you may need to replace the new modem. It shows that the router is working when using the old modem. Changes has been made when using the new modem but still the same.

     

     

    Hi James,

     

    Thanks for the reply.

     

    The test also shows that the modem works fine without the router; wired connection is fine. 

     

    So, Arris says it's the modem ("we're just a pass through"); Netgear says it's the router.

     

    Also, WiFi throughput was fine.  The issue was specific to LAN throughput.

     

    So, to me, this indicates some issue with the router/modem communication. 

     

    Hard to tell which is the culprit, but the fact remains that the only thing that changed was the modem.

     

    My resolution: switch the hardware back to the SB6120, return the 6190 and use that setup until it dies or is obselete (or not able to provide the speeds available with the Xfinity internet tier that I've purchased).

     

    Thanks... 

JamesGL's avatar
JamesGL
Master
Nov 01, 2016

Hi tslo,

 

I think you may need to replace the new modem. It shows that the router is working when using the old modem. Changes has been made when using the new modem but still the same.

 

JamesGL

Community Team

tslo's avatar
tslo
Aspirant
Nov 04, 2016
JamesGL wrote:

 

I think you may need to replace the new modem. It shows that the router is working when using the old modem. Changes has been made when using the new modem but still the same.

 

 

Hi James,

 

Thanks for the reply.

 

The test also shows that the modem works fine without the router; wired connection is fine. 

 

So, Arris says it's the modem ("we're just a pass through"); Netgear says it's the router.

 

Also, WiFi throughput was fine.  The issue was specific to LAN throughput.

 

So, to me, this indicates some issue with the router/modem communication. 

 

Hard to tell which is the culprit, but the fact remains that the only thing that changed was the modem.

 

My resolution: switch the hardware back to the SB6120, return the 6190 and use that setup until it dies or is obselete (or not able to provide the speeds available with the Xfinity internet tier that I've purchased).

 

Thanks...