Qos > Cos Scheduling Mechanism; Qos > Cos Output Scheduling - D-Link DGS-1210/ME User Manual

4 Configuration
From Port / To Port: A consecutive group of ports may be configured starting with the selected port.
Type: This drop-down menu allows you to select between RX (receive), TX (transmit), and Both. This
setting will determine whether the bandwidth ceiling is applied to receiving, transmitting, or both
receiving and transmitting packets.
No Limit: This drop-down menu allows you to specify that the selected port will have no bandwidth limit.
Enabled disables the limit.
Rate (63-1024000): This field allows you to enter the data rate, in Kbits per second, will be the limit for the
selected port. The value is between 63 and 1024000.
Click Apply to set the bandwidth control for the selected ports.
QoS > CoS Scheduling Mechanism
The CoS Scheduling Mechanism page allows user to select between a WRR and a Strict mechanism for
emptying the priority classes.
Strict Priority: Denoting a Strict scheduling will set the highest queue to be emptied first while the other
queues will follow the weighted round-robin scheduling scheme
WRR: Use the weighted round-robin (WRR) algorithm to handle packets in an even distribution in priority
classes of service.
Click Apply to let your changes take effect.
QoS > CoS Output Scheduling
CoS can be customized by changing the output scheduling used for the hardware classes of service in the
Switch. As with any changes to CoS implementation, careful consideration should be given to how network
traffic in lower priority classes of service is affected. Changes in scheduling may result in unacceptable levels
of packet loss or significant transmission delay. If you choose to customize this setting, it is important to
monitor network performance, especially during peak demand, as bottlenecks can quickly develop if the CoS
settings are not suitable.
Class ID: Specify the priority queue for the switch. The value is from 0 to 3.
Weight (1-55): Specify the weight for a CoS. The value is from 1 to 55.
DGS-1210 series Metro Ethernet Managed Switch User Manual
NOTE: The TX rate for Gigabit ports can only be
configured in multiples of 1850kbps. If any other
value is used, the system automatically rounds it
down to the lower multiple of 1850.
Figure 4.99 - QoS > CoS Scheduling Mechanism
Figure 4.100 - QoS > CoS Output Scheduling
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