Users Guide

Table Of Contents
1 Create a network-qos type class-map to match the trac classes. For LLFC, match all the trac classes from 0 to 7. For PFC, match
the required trac class.
OS10(config)# class-map type network-qos example-cmap-in-buffer
OS10 (config-cmap-nqos)# match qos-group 0-7
2 Create network-qos type policy-map to dene the actions for trac classes, such as a buer conguration 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
Congure egress buer
All port queues are allocated with reserved buers. When the reserved buers are consumed, each queue starts using the shared buers
from the default pool.
The reserved buer per queue is 1664 bytes for the speed of 10G, 25G, 40G, 50G, and 100G. The default dynamic shared buer 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 dene the actions for queues, such as a buer conguration 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 Buer mode
NOTE
: This feature is supported only on the S4200-ON series.
OS10 provides the exibility to congure the buer mode based on your system requirements. The system memory contains a list of packet
buers and per packet information (PPI), which is used to enable statistics tagging, ingress shaping, PFC, and output logical interface
stamping per multicast trac.
The S4200-ON series switch comes with a default deep buer of 4.63 GB. You can use the hardware deep-buffer-mode command
to enhance this deep buer to 6.24 GB. For information on how to congure deep buer mode, see Congure Deep Buer mode. The
following lists the total buer availability in the dierent modes:
Table 74.
Buer availability in dierent modes
Platform Default deep buer Enhanced deep buer
S4200–ON series 4.63 GB 6.24 GB
Deep Buer mode takes eect only after saving it in the startup conguration and reloading the switch.
NOTE
: Disabling the Deep Buer mode conguration during run-time is not supported.
Restrictions
Deep Buer mode and network QoS congurations cannot coexist. Enable Deep Buer mode only when the network QoS congurations;
for example LLFC and PFC are disabled. To congure Deep Buer mode, disable all network QoS related congurations.
1134
Quality of service