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DHCP problems Nighthawk R7000 and Mesh extender X6 EX7700

HuubIT
Aspirant

DHCP problems Nighthawk R7000 and Mesh extender X6 EX7700

Hi,


I recently purchased the Nighthawk X6 EX7700 as a range extender for my Nighthawk R7700 router.

 

EX7700 Firmware Version 1.0.0.222
R7000 Firmware Version 1.0.11.128

 

Configurate using the Web GUI works fine and everything works fine for several hours.

 

But after the several hours I'm running into DHCP problems. While my DHCP range is in 10.x.x.x subnet after a while clients are leased by a 169.254.x.x IP-adres with all network problems and no connection to the internet.


Anyone any ideas?

Thank you very much in advance

 

Regards, HuubIT

Message 1 of 10
plemans
Guru

Re: DHCP problems Nighthawk R7000 and Mesh extender X6 EX7700

What modem/gateway is the R7000 connected to? 

with the R7000 having a 10.*.*.* subnet, it makes me think you're running a gateway with its own router functionality. 

does your gateway have the R7000 setup in its DMZ? Or the R7000 in access point mode? 

 

Message 2 of 10
plemans
Guru

Re: DHCP problems Nighthawk R7000 and Mesh extender X6 EX7700

also, did you setup the EX7700 using wps or using the installation assistant?

Message 3 of 10
HuubIT
Aspirant

Re: DHCP problems Nighthawk R7000 and Mesh extender X6 EX7700

 


@plemans wrote:

What modem/gateway is the R7000 connected to? 

with the R7000 having a 10.*.*.* subnet, it makes me think you're running a gateway with its own router functionality. 

does your gateway have the R7000 setup in its DMZ? Or the R7000 in access point mode? 

 


I'm living in the Netherlands, so KPN Box 12 is the modem

Message 4 of 10
HuubIT
Aspirant

Re: DHCP problems Nighthawk R7000 and Mesh extender X6 EX7700


@plemans wrote:

also, did you setup the EX7700 using wps or using the installation assistant?


I tried it with both, both run into the same DHCP problems

Message 5 of 10
plemans
Guru

Re: DHCP problems Nighthawk R7000 and Mesh extender X6 EX7700

does your gateway have the R7000 setup in its DMZ? Or the R7000 in access point mode? 

Message 6 of 10
HuubIT
Aspirant

Re: DHCP problems Nighthawk R7000 and Mesh extender X6 EX7700


@plemans wrote:

does your gateway have the R7000 setup in its DMZ? Or the R7000 in access point mode? 


It's just wired on one of the 4 ethernet ports on the back of the modem, so I assume access point mode, out of the box install no DMZ configurated.

Message 7 of 10
plemans
Guru

Re: DHCP problems Nighthawk R7000 and Mesh extender X6 EX7700

Assuming is a poor choice. 

If both are in router mode, you're in a double nat. 

A double nat happens when you cascade more than 1 router.
https://kb.netgear.com/30186/What-is-Double-NAT

It doesn't always cause an issue but it can.


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-M...

Message 8 of 10
HuubIT
Aspirant

Re: DHCP problems Nighthawk R7000 and Mesh extender X6 EX7700


@plemans wrote:

Assuming is a poor choice. 

If both are in router mode, you're in a double nat. 

A double nat happens when you cascade more than 1 router.
https://kb.netgear.com/30186/What-is-Double-NAT

It doesn't always cause an issue but it can.


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-M...


Sorry to say, but this is not a double NAT problem. Option 1 is not feasible, option 2 is unwanted (and Wifi on modem is disabled), option 3 is not feaible due to other features 

Message 9 of 10
plemans
Guru

Re: DHCP problems Nighthawk R7000 and Mesh extender X6 EX7700


@HuubIT wrote:

Sorry to say, but this is not a double NAT problem. Option 1 is not feasible,---why not?  option 2 is unwanted (and Wifi on modem is disabled---again, why is it unwanted? and disabling wifi has nothing to do with putting the netgears IP into the DMZ. And disabling wifi does nothing to disable the routing/dhcp/nat features.), option 3 is not feaible due to other features 


So you're telling me you have a dhcp problem but the "double nat isn't it". the very thing that causes dhcp conflicts.

 

It might not be. But having your network setup properly is one way to ensure of that. 

 

And just answering questions with "not feasible" doesn't tell us anything. It doesn't say why you can't do that so that maybe we can help with fixing that. 

 

If you think it has nothing to do with your setup and everything to do with the extender, try downgrading the firmware a version. Maybe the one you're on has issues. 

 

 

Message 10 of 10
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