Configuring HQoS in Enhanced 8-CoS Mode

HQoS in enhanced 8-CoS mode ensures that CIR and PIR service traffic is scheduled based on their priorities.

Context

The HQoS scheduling model is divided into three scheduling levels: FQ, SQ (also referred to as user queue), and GQ. This ensures that the traffic of different users and services can be precisely differentiated, and thereby provides differentiated bandwidth management. An FQ caches data flows with the same CoS value, and each SQ corresponds to eight CoS values. In addition to providing the functions of FQs in 8-CoS mode, FQs in enhanced 8-CoS mode allow a device to differentiate, mark, and re-queue CIR and PIR traffic to preferentially ensure the CIRs for all services. Each FQ in enhanced 8-CoS mode has a CoS value in the range 0 to 7. A larger value indicates a higher CoS and queue priority.

Pre-configuration Tasks

Before configuring HQoS in enhanced 8-CoS mode, complete the following tasks:

Configure the physical parameters and link attributes of interfaces to ensure that they work properly.
Configure IP addresses for interfaces.
Configure IP routes on the router to ensure link connectivity.

Configuring an FQ Profile in Enhanced 8-CoS Mode: An FQ profile in enhanced 8-CoS mode is used to configure scheduling parameters for FQs of the eight priorities to provide differentiated QoS guarantee for service traffic with different priorities.

Configuring a User Queue Profile in Enhanced 8-CoS Mode: You can use a user queue profile to configure parameters for a user queue, such as a scheduling mode, scheduling priority, scheduling weight, and shaping value.

(Optional) Configuring a GQ Profile in Enhanced 8-CoS Mode: You can configure a shaping value and weight for a GQ to limit the volume of GQ traffic and prevent its burst. In this case, traffic can be sent at an even rate.

Defining a QoS Profile: A QoS profile is a collection of QoS scheduling parameters. You can configure scheduling parameters for user queues in a QoS profile.

Applying a QoS Profile: You can define a QoS profile and apply it to interfaces to implement unified scheduling of traffic on these interfaces.

Verifying the Configuration: After configuring HQoS based on an FQ in enhanced 8-CoS mode, you can check the queue configuration as well as the QoS profile application and configuration on an interface.