When the controller wants to modify a meter entry, the controller sends a meter modification message (OFPT_METER_MOD
) with the command value set as OFPMC_MODIFY
to the switch. This meter modification message contains the information required to identify and modify the meter.
The message format used by the controller to send the OFPT_METER_MOD
is defined in the Adding a new meter in a meter table recipe in Chapter 4, Group Table and Meter Table modification Messages (Part 2). Here, to modify a meter entry, the command field is set as OFPMC_MODIFY
.
When the switch receives a meter modification message with the command OFPMC_MODIFY
, the switch should fetch the meter entry based on the meter identifier in the message.
If the switch can fetch a meter entry, then the existing entry, along with its...