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Peter_50's avatar
Peter_50
Aspirant
Oct 21, 2023

Slow speeds if IPv6 turned on Orbi RBK353

I have a RBR 350 with  V4.4.1.29_3.10.80 firmware in router mode. I have changed internet provider from Virgin to the local Fibre to the Home company. With the ISP supplied Nokia Modem / Router I g...
plemans's avatar
plemans
Guru - Experienced User
Oct 21, 2023

Your nokia modem? Does it have its own integrated router? (most do)

If so, it causes a double nat 

A double nat happens when you cascade more than 1 router.
https://kb.netgear.com/30186/What-is-Double-NAT
Fixes? There’s 3 options but only use 1.
1. Put the modem/gateway in modem only/pass through mode. This disables its routing functions.
2. Leave the modem/gateway in router mode but put the Netgears IP address into its DMZ. This forwards the data to the netgear. You can either leave the modem/gateway’s wireless enabled or disabled. Just make sure its using a different wifi channel to prevent interference
3. Put the Netgear into access point mode. This disables its routing functions. Wifi/ethernet still works but it does disable some features.
https://kb.netgear.com/26765/Which-features-are-disabled-on-my-NETGEAR-router-when-it-is-set-to-AP-Mode

Peter_50's avatar
Peter_50
Aspirant
Oct 21, 2023

Thanks for your reply. This is not a double NAT problem. 


My ISP provides a choice of using their Router a Nokia G-2426G-A or if using own router they provide a Nokia G-010G-R modem to which I connected a Orbi RBR350.

 

Using their router the full speed around 900 is obtained with IPv6 and IPv4.

 

Using their modem and the Orbi with IPv4 only enabled full speed around 900 is obtained.


Using their modem and the Orbi with IPv4 and IPv6 enabled the speed drops to 300-400.

 

These speed are measured by Ethernet.

 

 

 

 

 

 

 

 

 

 

The ISP provided Router is a Nokia