Canon TS9521C not connecting to Wifi, shows wrong MAC address

[Matt04]

I recently changed internet providers, with my new one being a T-Mobile 5G home internet system.  Everything in my home has successfully paired to the new wifi with the exception of my Canon TS9521C printer.  I am getting an error on the printer for the MAC address.  Here are the MAC numbers I see on the router and on the printer:

Router:  18:A5:FF:75:0C:12

Printer:  18:A5:FF:75:0C:14

After days of troubleshooting and online research, I am at a loss.  Anyone understand what could be the problem?

[shadowsports]

Greetings,

This printer model supports 2.4Ghz wireless that uses WPA2 /AES encryption.  Please ensure your network supports these requirements.

In the case of a dual or tri-band router, using the same SSID name can sometimes cause connection issues.

Some options are; using a unique SSID name for each broadcast.  You can also temporarily disable 5G broadcasts while making the connection, then re-enable.  You should also ensure the broadcast uses WPA2 encryption.  Some devices allow WPA3/WPA2 for backwards compatibility.  You can also use WPA2 on its own.  Its very secure.  

Example:

[normadel]

Neither of those MAC addresses is for the printer. They are addresses of the router. A Canon MAC address would start with one of the prefixes listed here:

https://maclookup.app/vendors/canon-inc

Does your printer's Network Settings show its MAC address anywhere? The MAC address is hardwired into the printer. It does not change with a different router.

Does the printer have a valid DHCP-assigned IP address? This is what matters, not its MAC address.

The first three numbers of your router's IP address is what all the devices on the network should have. For example: 192.168.0.xxx. Your printer's address must be similar. All routers are not the same. Was your printer given a Static IP address that doesn't fit the pattern? If so, your router won't see it.

I suggest you first make sure the printer is getting a DHCP-assigned address. Then use that as a Static IP address, which the router will reserve outside of DHCP. This is how you keep a network device's IP address from ever changing......very desirable for a printer.  T-Mobile support should be able to assist you with this.

[Matt04]

The MAC addresses that I put in my original post show first what my router shows as its MAC address, and how my printer is "reading" the router, per what I see on the display when I try to connect the wifi.  I am not a professional and don't know how to do most of what you suggested, I am just hoping for a simple explanation and/or a way to reset everything and start over.  Logic tells me it is a printer issue, as everything else has connected to the new wifi with no issues.