Netgear M4300-52G-PoE+ (GSM4352PA) - 48x1G PoE+ Stackable Managed Switch with 2x10GBASE-T and 2xSFP+ (550W PSU) User Manual

To create a new class, enter a class name, select the class type, and click the Add button. 

This field also lists all the existing DiffServ class names, from which one can be selected. 
The switch supports only the Class Type value All, which means all the various match 
criteria defined for the class is satisfied for a packet match. All signifies the logical AND of 
all the match criteria. You can select the class type only when you are creating a new 
class. After the class is created, the Class Type field becomes nonconfigurable.

To rename an existing class, select the check box next to the configured class, update the 

name. 

Click the Apply button.

The updated configuration is sent to the switch. Configuration changes take effect 
immediately.

After creating a class, click the class name for an existing class.

The class name is a hyperlink.