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Quality of Service
Workflow to Configure QoS Settings
STEP 1
STEP 2
STEP 3
STEP 4
Cisco 220 Series Smart Plus Switches Administration Guide Release 1.0.0.x
Mapping IP Precedence to Queue
To map IP precedences to egress queues:
Click Quality of Service > General > IP Precedence to Queue.
Select the egress queue to which the IP precedence is mapped. Eight egress
queues are supported, where Queue 8 is the highest priority egress queue and
Queue 1 is the lowest priority egress queue.
Click Apply. IP precedence values to queues are mapped, and the Running
Configuration is updated.
Click Restore Defaults to restore the IP Precedence to Queue mappings to their
factory default settings.
Mapping DSCP to Queue
Use the DSCP to Queue page to map IP Differentiated Services Code Point
(DSCP) to egress queues. The DSCP to Queue table determines the egress
queues of the incoming IP packets based on their DSCP values. The original VLAN
Priority Tag (VPT) of the packet is unchanged.
By simply changing the DSCP to Queue mapping and the queue schedule method
and bandwidth allocation, it is possible to achieve the desired quality of services
in a network.
The DSCP to Queue mapping is applicable to IP packets if one of the following
exists:
•
The switch is in QoS basic mode and DSCP is the trusted mode.
•
The switch is in QoS advanced mode and the packets belongs to flows that
is DSCP trusted.
Non-IP packets are always classified to the best-effort queue.
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