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

[man_with_the_stick]

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.

 

[degrub]

1) Block the MAC address of the dishwasher from connecting on the 2.4 GHz radio. White list it for the 5GHz band.
2) Configure in the dishwasher a static address or turn off its 2.4 GHz radio
3) Replace the dishwasher ?

 

[man_with_the_stick]

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.

 

[man_with_the_stick]

Well, oddly enough, although I have set the router to refuse the connection of the dishwasher to the 5 GHz band (Wireless -> Wireless MAC filter, set the filter mode to reject, added the dishwasher MAC address), I can still see it connected to the router using that band.
Other odd thing, I have used the 2 commands below on the router, but the dishwasher wasn't disconnected (it was still connected to the 5 GHz band with the same 192.168.101.X address).

wl -i eth6 deauthenticate <dishwasher_MAC>
wl -i eth5 deauthenticate <dishwasher_MAC>

Wasn't that command supposed to make it reconnect?

 

[ColinTaylor]

Well, oddly enough, although I have set the router to refuse the connection of the dishwasher to the 5 GHz band (Wireless -> Wireless MAC filter, set the filter mode to reject, added the dishwasher MAC address), I can still see it connected to the router using that band.
Other odd thing, I have used the 2 commands below on the router, but the dishwasher wasn't disconnected (it was still connected to the 5 GHz band with the same 192.168.101.X address).

wl -i eth6 deauthenticate <dishwasher_MAC>
wl -i eth5 deauthenticate <dishwasher_MAC>

Wasn't that command supposed to make it reconnect?

Those are the wrong commands/interfaces.

eth5 and eth6 are the primary (non-guest) 2.4 and 5 GHz Wi-Fi interfaces. Guest networks use interfaces wl0.1, wl1.1, wl0.2, etc.

If you want to use the MAC filter on guest Wi-Fi networks make sure you're using the option under the relevant guest network's settings and not the primary network's settings under Wireless - Wireless MAC Filter.

 

[man_with_the_stick]

If you want to use the MAC filter on guest Wi-Fi networks make sure you're using the option under the relevant guest network's settings and not the primary network's settings under Wireless - Wireless MAC Filter.

I've got it. I have just noticed a small Enable MAC Filter at the end of each guest network band configuration. Thanks.