jaclaz
October 14, 2025, 2:42pm
14
Your mission, should you accept it is to change the MAC address of the bridge(s) (if auto-mac=no - recommended[1]).
If your original configuration is "default" there will be only one bridge and that bridge will normally have the MAC address of the first interface added to the bridge.
More details here:
A known recommendation when setting up a Mikrotik device is to NOT have the bridge(s) configured with auto-mac=yes, but rather assigning manually a MAC and set auto-mac=no.
The “default-default” (i.e. no configuration like after a reset or netinstall and on devices that have not a default configuration from Mikrotik) is auto-mac=yes, which implies that the automatically assigned MAC is the same as the first ethernet port added to bridge.
With a change of configuration involving changes in the …
[1] and Rule #6 :
Preamble and disclaimer:
The following is a set of Rules that are intended as advice useful to avoid the most common errors observed in configuration posted on this forum.
It is my personal take on the matter, and in no way approved, endorsed or recommended, officially or unofficially, by Mikrotik or their partners or by anyone else.
In other words you are perfectly free to ignore them, though they represent (IMHO) a sort of (good) cheat sheet/reminder for people starting to use these devices…