Dynamic Threshold Profiles for Shared Buffer Pools

Benefits of Dynamic Threshold Profile Configuration

• Enhances buffer utilization during congestion and microburst scenarios by allowing tailored allocation of buffer resources per priority group.

• Optimizes traffic handling capabilities by integrating with existing CoS configurations and improving ECN fill level calculations.

• Provides precise control over buffer utilization through the configuration of lossless and lossy priority groups and management of congestion notification points.

• Supports up to 128 profiles, offering robust adaptability for diverse networking environments.

• Improves network performance by enabling dynamic adjustment of buffer resources according to varying interface speeds and traffic types.

Overview

Dynamic Threshold Profile configuration introduces a sophisticated method for managing shared buffer pools at the priority group level, enhancing your control over buffer allocation tailored to specific traffic conditions. By configuring dynamic threshold profiles, you can assign and adjust buffer resources dynamically based on varying speeds and types of traffic interfacing with your network. This granular level of control is particularly advantageous during congestion or microburst scenarios, where optimized buffer management can significantly enhance network performance and stability. You have the flexibility to define these thresholds per priority group, allowing for precise buffer management that aligns with your network's operational requirements.

The system supports up to 128 dynamic threshold profiles, allowing for extensive adaptability. This flexibility is crucial in diverse networking environments, where interfaces operate at various speeds and manage different types of traffic. Furthermore, dynamic threshold profiles integrate seamlessly with existing class-of-service configurations, enhancing ECN fill level calculations based on global alpha values. This integration ensures that your network can efficiently handle diverse traffic conditions, providing robust performance through precise buffer management.

Note:

You can assign a global dynamic threshold value through the buffer-partition configuration at the [edit class-of-service shared-bufferingress] hierarchy level. Dynamic threshold profiles applied to ingress interfaces override this value.

Having a global alpha value is useful in certain cases, but it is not affective when you have ports operating at various speeds. You cannot achieve effective utilization of the shared buffer pool by providing the same buffer values for a ports operating at 100G, 400G, and 800G.

A dynamic threshold profile maps dynamic thresholds to buffer priority groups. This feature assumes that each ingress queue is assigned a buffer priority group and that each port has lossless and lossy priority groups:

• Priority groups 0 to 5 are used for lossless flows.

• Priority group 6 is reserved for internal use.

• Priority group 7 is used for lossy flows.

Per queue alpha used on an egress lossless queue is the same as the alpha value (dynamic threshold value) configured on the ingress priority group associated with that queue, either through a dynamic threshold profile or the global alpha value if there is no dynamic threshold profile associated with the ingress queue.