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lasttime's avatar
lasttime
Aspirant
Sep 26, 2020

Cannot achieve fiber speeds RBR50 with Centrylink Fiber

Hello,   With the C4000gx and a direct connection i get full gigabit speed (900+ up and down). With the Orbi in AP mode and connected to the C4000gx, I get full gigabit speed from the speed test d...
FURRYe38's avatar
FURRYe38
Guru - Experienced User
Sep 29, 2020

What Firmware version is currently loaded?

 

Your ISP modem/ONT as a built in router already,

This would be a double NAT (two router) condition which isn't recommended. https://kb.netgear.com/30186/What-is-Double-NAT
https://kb.netgear.com/30187/How-to-fix-issues-with-Double-NAT
Couple of options,
1. Configure the modem for transparent bridge or modem only mode. Then use the Orbi router in router mode. You'll need to contact the ISP for help and information in regards to the modem being bridged correctly.
2. If you can't bridge the modem, disable ALL wifi radios on the modem, configure the modems DMZ/ExposedHost or IP Pass-Through for the IP address the Orbi router gets from the modem. Then you can use the Orbi router in Router mode.
3. Or disable all wifi radios on the modem and connect the Orbi router to the modem, configure AP mode on the Orbi router. https://kb.netgear.com/31218/How-do-I-configure-my-Orbi-router-to-act-as-an-access-point and https://www.youtube.com/watch?v=H7LOcJ8GdDo&app=desktop
https://kb.netgear.com/26765/Disabled-Features-on-the-Router-when-set-to-AP-Mode

 

I would try option #3...

lasttime wrote:

Hello,

 

With the C4000gx and a direct connection i get full gigabit speed (900+ up and down).

With the Orbi in AP mode and connected to the C4000gx, I get full gigabit speed from the speed test directly from the Orbi router. Thus, I know that the Orbi router can handle the speed.


However, when I remove the C4000gx and directly connect the Orbi to the fiber, I get half to 1/3rd the speeds I was getting. Less than 400up, and maybe 300 down. Is there a way to get the Orbi to get the speeds from fiber, or is it too slow to handle being both the modem and the router at the same time? 

 

I have tried cloning the C4000gx mac to see if that improved things, it did not. Everything else is off (no QOS and no traffic meter). VLAN is setup as VLAN tag group with the VLAN Tag as set by centurylink and the priorty is set to 0.

 

Any suggestions?

 

lasttime's avatar
lasttime
Aspirant
Sep 30, 2020

 

Mikey94025- I was using the speedtest from the setup page on the Orbi. When in AP mode connected to the C4000gx I was getting at gigabit speed. When I had it in bridge mode I got the lower speeds and when I removed the centurylink router (the C4000gx) I got the lower speeds. I did test the speeds from the device, but I got wifi speeds (lower than what I was seeing when in AP mode).

 

FURRYe38I am running V2.5.1.16. I don't have a double NAT problem (the type of connection I am trying is only the Orbi to fiber). Your three options, I have done 1 and 3 but that excludes using the functions on the Orbi router I am looking for (use of the app, use of parental controls etc). I could try option 2, but I don't see why that would get me better speeds than removing the centurylink router entirely. 


My real question is if anyone has run the RBR50 and gotten gigabit speeds. I had seen some inferences on the boards that a consumer router like this can't do the VLAN tagging and router functions at such speeds.