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DHCP Big Problem AC68U merlin, DHCPNAK(br0) 0.0.0.251

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raxor

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SOLVED : i have 2 dhcp servers overlapping ip's.

.............

Hi. I have AC68U as a primary router, I have class c network 192.168.1.0/24

Router have 192.168.1.2 IP and act as unique dhcp server. He receive wan ip from cable modem.

Well. Now the problem. If any client wired or not, new and old asks for new ip, Router always give me 0.0.0.250 IP or 0.0.0.251. This is very annoying and I going crazy with this. I don't know where I find the solution. Sure is a simplest but....

Router dhcp conf is this:

e8yzumam.jpg


Dhcp Log query.

Aug 12 14:22:09 dnsmasq-dhcp[781]: DHCPDISCOVER(br0) 30:39:26:0b:xx:xx
Aug 12 14:22:09 dnsmasq-dhcp[781]: DHCPOFFER(br0) 192.168.1.60 30:39:26:0b:xx:xx
Aug 12 14:22:09 dnsmasq-dhcp[781]: DHCPREQUEST(br0) 0.0.0.251 30:39:26:0b:xx:xx
Aug 12 14:22:09 dnsmasq-dhcp[781]: DHCPNAK(br0) 0.0.0.251 30:39:26:0b:xx:xx wrong server-ID

My workaround is using manually assignment static ip. And needs router and client reboot for work.

This occurs with any client, chromecast, android, ipad, htpc, android box, etc....

Merlin version is 376.44, but problem goes from older versions too.

Any advice?
 
Last edited:
What a fool.... I forget to disable dhcp server from old nas I recycled from office.

a6ugetat.jpg


Range was 192.168.1.1 / 192.168.1.200. Obviously, insured problem. Overlapping ip.

I need show to all what a fool I am, to clarify my mind and find the solution. Haha

Sorry
 

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