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Orbi WiFi 7 RBE973
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Re: conflict IP address after power failure

GoldenJ
Guide

conflict IP address after power failure

In my RAX45 router, I reserved some IP addresses for specific devices while leaving the others to be determined by DHCP. However, after a power outage, a reversed IP address was assigned to two different devices, resulting in an IP address conflict warning for the devices.  I wanted to change the IP address of one device manually to resolve the issue but could not find where to do it. So, I added a new IP address to be reversed and assigned it to one of the devices with the conflicting IP address. However, the IP address of the device was not changed when I checked in the "Attached Devices" after refreshing the list. The two devices still shared the same IP address. I powered cycle the router, still got the same result.

 

My questions are:

1. How come the router still assigns the same IP address to two devices even though I reserve the IP address for a specific device? Is it a firmware malfunction?

2. Can I change the IP address of a device manually to resolve the conflicting IP address issue?

 

Message 1 of 8

Accepted Solutions
microchip8
Master

Re: conflict IP address after power failure

You have to restart the device(s) so they can request a new IP from the DHCP which will then give out the reserved one. Restarting the router won't do it


View solution in original post

Message 3 of 8

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FURRYe38
Guru

Re: conflict IP address after power failure

What are these devices you reserved IPs for? 

 

Any of them phones or pads? 

Be sure to disable any MAC Address randomizers on phones and pads while at home:
https://community.netgear.com/t5/Nighthawk-App/NETGEAR-Mobile-Applications-and-Apple-Devices-FAQ/td-...

Message 2 of 8
microchip8
Master

Re: conflict IP address after power failure

You have to restart the device(s) so they can request a new IP from the DHCP which will then give out the reserved one. Restarting the router won't do it


Message 3 of 8
GoldenJ
Guide

Re: conflict IP address after power failure

Not phone or pad. The devices are Synology NAS and YAMAHA receiver.

Message 4 of 8
GoldenJ
Guide

Re: conflict IP address after power failure

Thanks. Restarting the device worked.

Message 5 of 8
GoldenJ
Guide

Re: conflict IP address after power failure

Still have the question of why the router still assigns the same reserved address to different devices.

Message 6 of 8
FURRYe38
Guru

Re: conflict IP address after power failure

Ok. Something you might do for those two devcies Setup a static IP address outside of the routers default IP address pool. Some devices like NAS and AVRs don't need much or any router management and recommend setting a static IP address on these devices. You'll need to change the routers IP address pool size. I recommend .100 to .200. Then you'll have room on either side of this pool for static IP addressed devices. 

https://kb.netgear.com/24089/How-do-I-specify-the-pool-of-IP-addresses-assigned-by-my-Nighthawk-rout...

What I use for my NAS and AVR and others like printers and cameras. 

 

Glad you got it working. Be sure to save off a back up configuration to file for safe keeping. Saves time if a reset is needed.
https://kb.netgear.com/24231/How-do-I-back-up-the-router-configuration-settings-on-my-Nighthawk-rout...
Enjoy. 📡

 

Message 7 of 8
GoldenJ
Guide

Re: conflict IP address after power failure

Thanks a lot for the advice!

Message 8 of 8
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