:global bMACIsSet 0;
:foreach k in=[/interface find where !(slave=yes  || name="ether1" || name="ether2" || name~"bridge")] do={
    :local tmpPortName [/interface get $k name];
    :if ($bMACIsSet = 0) do={
        :if ([/interface get $k type] = "ether") do={
            /interface bridge set "bridge" auto-mac=no admin-mac=[/interface get $tmpPortName mac-address];
            :set bMACIsSet 1;
        }
    }
        :if (([/interface get $k type] != "ppp-out") && ([/interface get $k type] != "lte")) do={
            /interface bridge port add bridge=bridge interface=$tmpPortName;
        }
}