# CoS Assignment

Configuration > Output Scheduling > Class of Service Assignment

Assigning a Class of Service (CoS) value to a queue and threshold combination determines which packets to drop to avoid congestion if a threshold in a queue is exceeded.

For example, assigning CoS value 0 to queue 1, threshold 1, means all the packets with CoS 0 are dropped if the number of packets in queue 1 exceeds threshold 1.

To view the definition for a particular MIB variable, click the appropriate link from the following list:

- Queue Type (caqCosAssignQueueType)

- CoS Value (caqCosAssignCos)

- Queue Number (caqCosAssignQueueNumber)

- Threshold Value (caqCosAssignThresholdNumber)

The following list specifies buttons in this dialog box, as well as their function:

- Click OK to continue.

- Click Apply to save the changes in the dialog box.

- Click Cancel to close the dialog box.

- Click Print to print the contents of the dialog box.

- Click Help to access the online help.

Queue Type (caqCosAssignQueueType)

The queue type of this interface.

CoS Value (caqCosAssignCos)

Indicates the CoS value which is used to match the CoS value of packets for queue assignment.

Queue Number (caqCosAssignQueueNumber)

The queue number with which the CoS value denoted by caqCosAssignCos will be associated. This number must not be larger than the queue count defined by caqCosAssignQueueType.

Threshold Value (caqCosAssignThresholdNumber)

The threshold number with which the CoS value denoted by CoS Value (caqCosAssignCos) will be associated. This number must not larger than the threshold count defined by caqCosAssignQueueType.