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R6700 losing internet speed

jasonyang
Aspirant

R6700 losing internet speed

When my Internet speed used to be 25Mbps, the download speed I get from R6700 router (wired & wireless) was average 28Mbps. Last week my ISP doubled my Internet speed to 55Mbps but I can only get avg download speed of 28Mbps from the R6700(wired connection). When I connected directly to modem, my download speed is 60Mbps. I also tried to use another old router and still get 60Mbps.

 

Any solution?

Model: R6700|Nighthawk AC1750 Smart WiFi Router
Message 1 of 5

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FURRYe38
Guru

Re: R6700 losing internet speed

Disable QoS on the NG router while speed testing. 

My Setup ISP SparkLight | Internet Cable 1000↓/50↑ CAX80 Modem Mode |  Wifi Router MK83+ (Router Mode) | and RBK853 (Router Mode) | Switches NG GS105/8, GS308v3, GS110MX and XS505M | Additional NG HW: C7800/CAX80/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: MK63, MR6150, R7000, R7800, R7960P, R8000, R8500, R9000, RAXE500, RAX50, XR450, XR700, XR1000, EX7500/EX7700

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FURRYe38
Guru

Re: R6700 losing internet speed

Whats the Mfr and model# of the ISP modem? Any built in router? 

 

Disable QoS on the NG router while speed testing. 

My Setup ISP SparkLight | Internet Cable 1000↓/50↑ CAX80 Modem Mode |  Wifi Router MK83+ (Router Mode) | and RBK853 (Router Mode) | Switches NG GS105/8, GS308v3, GS110MX and XS505M | Additional NG HW: C7800/CAX80/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: MK63, MR6150, R7000, R7800, R7960P, R8000, R8500, R9000, RAXE500, RAX50, XR450, XR700, XR1000, EX7500/EX7700

Message 2 of 5
jasonyang
Aspirant

Re: R6700 losing internet speed

The modem is Motorola SB6121 and has no built-in router  I connected my TP-link router (450M) to the modem and my test speed increased to ISP's advertised speed. I don't think it's the modem's problem.

Message 3 of 5
FURRYe38
Guru

Re: R6700 losing internet speed

Disable QoS on the NG router while speed testing. 

My Setup ISP SparkLight | Internet Cable 1000↓/50↑ CAX80 Modem Mode |  Wifi Router MK83+ (Router Mode) | and RBK853 (Router Mode) | Switches NG GS105/8, GS308v3, GS110MX and XS505M | Additional NG HW: C7800/CAX80/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: MK63, MR6150, R7000, R7800, R7960P, R8000, R8500, R9000, RAXE500, RAX50, XR450, XR700, XR1000, EX7500/EX7700

Message 4 of 5
FURRYe38
Guru

Re: R6700 losing internet speed

Make sure QoS is configured correctly for your ISP speeds as well. Looks like disabling it for speed testing works too. Enjoy. 

My Setup ISP SparkLight | Internet Cable 1000↓/50↑ CAX80 Modem Mode |  Wifi Router MK83+ (Router Mode) | and RBK853 (Router Mode) | Switches NG GS105/8, GS308v3, GS110MX and XS505M | Additional NG HW: C7800/CAX80/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: MK63, MR6150, R7000, R7800, R7960P, R8000, R8500, R9000, RAXE500, RAX50, XR450, XR700, XR1000, EX7500/EX7700

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