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Nighthawk R9000 - Will Not assign IP address

My Nighthawk router suddenly stopped assigning IP address on the LAN.  I've had to connect wirelessly to connect at all.  I've uninstalled the network cards on my computers and reinstalled the drivers.  I've restored the router to factory settings and updated the firmware.  I set it up according to instructions and have allocated a band of IP address from 192.168.1.2 to 25.  I can see on the web interface that everything is set up correctly.  I assigned some devices a static IP to see if that works but no.  The only thing I see is that the router will not allow me to check the Dynamic QOS box and then the Apply button as it is grayed out.  Does anyone have any ideas what the issue is?  thx   

Model: R9000|Nighthawk X10 AD7200 Smart WiFi Router
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Sage

Re: Nighthawk R9000 - Will Not assign IP address

> My Nighthawk router suddenly stopped assigning IP address on the LAN.
> I've had to connect wirelessly to connect at all. [...]

   What, exactly, does "on the LAN" mean to you?  A wired connection to
the R9000?  ("Wired" and "Local" are spelled differently for a reason.
A device with a wireless connection is also "on the LAN".)  Does that
mean that wireless devices work as expected?

> [...] I've uninstalled the network cards on my computers and
> reinstalled the drivers. [...]

   Probably wasted effort.  What do the port-status LED indicators on
the router (and the computer, if any) indicate?

   Visit http://netgear.com/support , put in your model number, and look
for Documentation.  Get the User Manual.  Look for "Front View" and
"Table 1. LED descriptions".  (Admire the correlation between "Ethernet
ports 1-4" and "1 2 3 4 5 6".)

   If the port-status LED indicators don't show a good physical link,
then I'd expect that fiddling with the router settings would be a waste
of time.  As a test, connecting any two LAN Ethernet ports with a
known-good cable should show a good physical link for both ports.

> [...] I've restored the router to factory settings [...]

   How, exactly?  Did you reconfigure it manually after this, or restore
old, saved settings?

> [...] and updated the firmware. [...]

   To what, exactly?

> [...] I set it up according to instructions [...]

   Which "instructions"?  To what is this thing connected?  (Hint: If a
device has multiple Ethernet ports, then "connected to device" is not
enough detail.)

> [...] and have allocated a band of IP address from 192.168.1.2 to 25.

   Are you talking about the DHCP pool, or what?  If so, then why so
small?  How many client devices have you?

> [...] I can see on the web interface that everything is set up
> correctly. [...]

   Think for a moment about how little useful information that conveys
to the non-psychics in your audience.

> [...] I assigned some devices a static IP to see if that works but no.
> [...]

   Are you talking about actual static addresses, configured on the
devices themselves, or reserved (dynamic) addresses configured on the
(DHCP server on the) router, or what?  As usual, showing actual actions
with their actual results (error messages, LED indicators, ...) can be
more helpful than vague descriptions or interpretations.

   What kind of "no" is this?  See "As usual, [...]", above.

> [...] The only thing I see is that the router will not allow me to
> check the Dynamic QOS box and then the Apply button as it is grayed out.

   Is that the only thing which is grayed out?

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Re: Nighthawk R9000 - Will Not assign IP address

So, it turns out it was a wireless access point I set up months ago, suddenly started causing issues.  I set up a netgear 6020 as an access point and everything was working fine up til a few days ago.  Suddenly all my devices using a cable to connect to the router suddenly couldn't get an IP, but displayed the message "Unidentified network".  Every device could connect wirelessly but not with a cable. I disconncted the 6020, reset it to factory and then set it up as an AP again.  I reconnected everything and it works again.  Not sure why the 6020 would suddenly cause issues but there it is.  If anyone can explain it I'd be interested in learning.

Model: R6700|Nighthawk AC1750 Smart WiFi Router,R9000|Nighthawk X10 AD7200 Smart WiFi Router
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