Dell EMC SmartFabric OS10 User Guide Release 10.5.0

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Configure egress buffer

All port queues are allocated with reserved buffers. When the reserved buffers are consumed, each queue starts using the shared buffers from the default pool.

The following table lists the values allocated for the default egress buffers on the S4100-ON series platform. These values may differ for different platforms and speeds. Use the show qos egress buffers command to view the default egress buffers on your switch.

Table 1. Default egress buffers on the S4100-ON series platformDefault egress buffers on the S4100-ON series platform
Speed	10G	25G	40G	50G	100G
Reserved buffers for each queue of a port (default)	1664 bytes	1664 bytes	1664 bytes	1664 bytes	1664 bytes

The default dynamic shared buffer threshold is 8.

Create a queuing type class-map to match the queue.

OS10(config)# class-map type queuing example-cmap-eg-buffer
OS10(config-cmap-queuing)# match queue 1

Create a queuing type policy-map to define the actions for queues, such as a buffer configuration and threshold.

OS10(config)# policy-map type queuing example-pmap-eg-buffer
OS10(config-pmap-queuing)# class example-cmap-eg-buffer
OS10(config-pmap-c-que)# queue-limit queue-len 200 thresh-mode dynamic 5