5 Managing Switch
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Wieland Electric GmbH | BA001047 (Rev. A) | 06/2018
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 func-
tion.
Apply
Click Apply to save the values and update the screen.
The ensuing table for QoS Status settings are informational only: Port, CoS value, Remark CoS, Remark
DSCP and Remark IP Precedence.
5.10.1.3
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 im-
portance (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.
To access this page, click QoS > General > QoS Scheduling.
Figure 5.63 QoS > General > QoS Scheduling
The following table describes the items in the previous figure.
