Users Guide

2. Create network-qos type policy-map to define the actions for traffic classes, such as a buffer configuration and threshold.
OS10(config)# policy-map type network-qos example-pmap-in-buffer
OS10(config-pmap-network-qos)# class example-cmap-in-buffer
OS10 (config-pmap-c-nqos)# pause buffer-size 300 pause-threshold 200 resume-threshold 100
OS10 (config-pmap-c-nqos)# queue-limit thresh-mode dynamic 5
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 92. Default 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.
1. 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
2. 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
Deep Buffer mode
NOTE:
This feature is supported only on the S4200-ON series.
OS10 provides the flexibility to configure the buffer mode based on your system requirements. The system memory contains a list of
packet buffers and per packet information (PPI), which is used to enable statistics tagging, ingress shaping, PFC, and output logical
interface stamping per multicast traffic.
The S4200-ON series switch comes with a default deep buffer of 4.63 GB. You can use the hardware deep-buffer-mode
command to enhance this deep buffer to 6.24 GB. For information on how to configure deep buffer mode, see Configure Deep Buffer
mode. The following lists the total buffer availability in the different modes:
Table 93. Buffer availability in different modes
Platform Default deep buffer Enhanced deep buffer
S4200–ON series 4.63 GB 6.24 GB
Deep Buffer mode takes effect only after saving it in the startup configuration and reloading the switch.
NOTE:
Disabling the Deep Buffer mode configuration during run-time is not supported.
Restrictions
Deep Buffer mode and network QoS configurations cannot coexist. Enable Deep Buffer mode only when the network QoS configurations;
for example LLFC and PFC are disabled. To configure Deep Buffer mode, disable all network QoS related configurations.
Quality of service
1109