The OpenFlow meter tables are used to implement simple QoS operations such as rate limiting to complex QoS frameworks such as DiffServ. For more information regarding the meter table, refer to the Introduction section in Chapter 4, Group Table and Meter Table modification Messages (Part 1).
When the controller wants to program a meter, the controller should send a meter modification message (OFPT_METER_MOD
) to the switch. This meter modification message contains the information required to program the meter table which includes the meter identifier, bands etc.