[RT-AX88U] WAN Lease time expires

[TIE_Interceptor]

Hi.
I'm facing a very irritating issue. My WAN Lease time continuously expires. The interesting thing is that even if I set Static IP - WAN loses IP and switches into the Cold-Standby.

My Network structure:
- Router: RT-AX88U.
- WAN: Bitdefender Box 2. Static IP for the Router.
- Ethernet WAN: 5G Modem. Static IP for the Router.

WAN Settings and Syslog attached.
I tried changing all WAN Settings - no results. WAN keeps losing IP.

I will be grateful for any advice on how it may be fixed on the stock firmware.
Thanks!

 

[ColinTaylor]

A DHCP lease duration is dictated by the DHCP server, not the DHCP client.

In your case the device at 192.168.0.1 is issuing a lease of 43200 seconds and the device at 192.168.8.1 is issuing a lease of 86400 seconds.

 

[TIE_Interceptor]

A DHCP lease duration is dictated by the DHCP server, not the DHCP client.

In your case the device at 192.168.0.1 is issuing a lease of 43200 seconds and the device at 192.168.8.1 is issuing a lease of 86400 seconds.

That's obvious. But for some reason my router loses IP. Even if it is set to static on both "Server" and "Client".
Rebooting of the "Server" doesn't help.
From this I'm making an assumption that it's kinda bug in the AX88 FW or a conflicting setting elsewhere.

Edited. My reserve line (192.168.8.1) is working perfectly. The main channel (192.168.0.1) loses IP. Only WAN refresh helps.

 

[TIE_Interceptor]

It keeps happening

Spoiler: Screenshot