Advantech EKI-7712 Series, User Manual

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EKI-7720 Series User Manual 105
The following table describes the items in the previous figure.
To access this page, click QoS > General > QoS Status .
The following figure displays the QoS Status settings.
Figure 4.151 QoS > General > QoS Status
4.8.1.3 Queue Scheduling
The switch support eight CoS queues for each egress port. For each of the eight
queues, two types of scheduling can be configured: Strict Priority and Weighted
Round Robin (WRR).
Strict Priority scheduling is based on the priority of queues. Packets in a high-priority
queue are always sent first and packets in a low-priority queue are only sent after all
the high priority queues are empty.
Weighted RoundRobin (WRR) scheduling is based on the user priority specification
to indicate the importance (weight) of the queue relative to the other CoS queues.
WRR scheduling prevents low-priority queues from being completely ignored during
periods of high priority traffic. The WRR scheduler sends some packets from each
queue in turn.
Item Description
Port Enter the port number to associate with the QoS setting.
CoS Value Click the drop-down menu to designate the Class of Service (CoS)
value (0 to 7) for the Port entry.
Remark CoS Click Disabled or Enabled to setup the Remark CoS function. When
enabled the LAN (preassigned priority values) is marked at Layer 2
boundary to CoS values.
Remark DSCP Click Disabled or Enabled to setup the DSCP remark option for the
QoS function.
Remark IP Prece -
dence
Click Disabled or Enabled to setup the Remark IP Precedence for
the QoS function.
Apply Click Apply to save the values and update the screen.