I have a use case where I need to determine whether two MAC addresses belong to the same router with dual band connection 2.4 GHz and 5 GHz.
When I did some study, I found that the MAC address of all WiFi APs serving 2.4 GHz and that of 5 GHz differ only by 2 in their last digits.
Example:
2.4 GHz MAC: aa:bb:cc:dd:ee:53
5 GHz MAC: aa:bb:cc:dd:ee:55
So is there any standard for dual band routers, that makes them follow this rule ?
Also, if not this, is there any other way I can know whether the two MAC addresses are of the same router, but with different bands.
Best Answer
A company will register with the IEEE to get an OUI (Organizationally Unique Identifier). Beyond that, the company is free to assign MAC addresses within the OUI as it sees fit. There are no outside standards or requirements for how a company assigns MAC addresses within its OUI.
What you are asking can vary from manufacturer to manufacturer. There is nothing to which you can refer that explains it for all WAPs.