The switch organizes 4 separate hardware queues on each physical port.
Packets received from different applications receive the corresponding priority.
The switch supports 3 types of priority:
1) by the number of port
2) by CoS label
3) by ToS (DSCP) label
5.3.17.1 General settings
QoS → General Settings
Select basic settings on the "General settings" tab
Figure 5.3.17.1.1 Configuring QoS
State –
enable/disable QoS operation
QoS Scheduling mechanism
– queue scheduling type:
1.
Weighted fair priority
– packets with different priority are processed by
the switch with the ratio 8: 4: 2: 1. It means, the switch will process 8 high
priority packets, 4 medium priority packets, 2 low priority packets and 1 packet
with the lowest priority in one time unit.
2.
Strict priority
– packets with a higher priority will be processed first, until
the high-priority packet queue becomes empty. Meanwhile, packets with lower
priority will be in the queue.
Weighted fair priority
is recommended by default.
Priority mode
– priority for choosing CoS or ToS.
CoS only
– only CoS is active and the package priority is determined only by
the CoS (Class of Service) field in the Ethernet frame.
ToS only
– only ToS is active and packet priority is determined only by the
ToS (Type of Service) field in the IP header.
