Mapping Dscp To Queue - Cisco 300 Series Administration Manual

Managed switch

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Mapping DSCP to Queue

The DSCP (IP Differentiated Services Code Point) to Queue page maps DSCP

values to egress queues. The DSCP to Queue Table determines the egress

queues of the incoming IP packets based on their DSCP values. The original VPT

(VLAN Priority Tag) 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:

The device is in QoS Basic mode and DSCP is the trusted mode, or

The device 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.

Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)

Quality of Service

Configuring QoS - General