5.3.17.3 Configuring Class of Service
QoS → CoS
Figure 5.3.17.3.1 Configuring CoS
The Class of Service (CoS) field is 3 bits in the 802.1Q tag of the Ethernet
frame. It allows to divide traffic into 8 priorities with different markings at the link
level. The switch supports 4 queues of service: Queue 0 – Queue 3. Queue 3 is the
queue with the highest priority, Queue 0 is the queue with the lowest priority.
The setting will apply, if you set the value of CoS State to
Enable
in the QoS
General Settings tab.
By default, the priorities are sorted by queue as follows:
Priority 0 belongs to Queue 1
Priority 1 belongs to Queue 0
Priority 2 belongs to Queue 0
Priority 3 belongs to Queue 1
Priority 4 belongs to Queue 2
Priority 5 belongs to Queue 2
Priority 6 belongs to Queue 3
Priority 7 belongs to Queue 3
