4 Configuration
DGS-1210 series Metro Ethernet Managed Switch User Manual
84
Figure 4.118 – QoS > Bandwidth Control
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.
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.
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.
Figure 4.119 - QoS > CoS Scheduling Mechanism
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 make the configurations 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.
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