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Wifi client of the guest network 1 doesn't get new IP address when changing the band

man_with_the_stick

New Around Here
Hi.

I have searched in this forum, on the Internet and I have even used ChatGPT to look for the solution but I haven't found one.

The setup looks like this:
  • Router: ASUS RT-AX86S using the Asuswrt Merlin version 3004.388.8_4.
  • I have set the same SSID for both bands in the regular Wireless page. The clients connected to the regular WiFi network receive IPs in the rage 172.16.1.0/24
  • I have enabled both bands of the Guest Network 1 and assigned the same SSID for both bands, but different than the SSID of the regular WiFi. The clients connected to the 2.4 GHz WiFi receive IPs in the range 192.168.101.0/24. The clients connected to the 5 GHz WiFi receive IPs in the range 192.168.102.0/24.
  • I don't use YazFi.
The problem is I have a dishwasher that initially connects to the 2.4 GHz WiFi of the guest network, it gets an IP in the range 192.168.101.0/24 then for some unknown reason it connects to the 5 GHz Wifi but it doesn't get a new IP. Consequently the dishwasher remains with an IP in the range 192.168.101.0/24 when it should have one in the range 192.168.102.0/24 and it is unreachable.

Could you, please, tell me what I should change in order to force the dishwasher pick the new IP when it changes the band?
I would like not to use YazFi.

Best regards,
Alexandru.
 
Thank you. Blocking the device from connecting to a specific band worked. I am still interested to know where the culprit was: on the router side or on the device side. The dishwasher is a Bosch one and I haven't found many things about the embedded computer. Consequently, I don't know if I can make it request a new address from the DHCP server or limit where it connects.
 

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