Reference Guide

OS10(config)# policy-map type queuing solar
OS10(conf-pmap-queuing)# class magnum
OS10(conf-pmap-c-que)# priority
OS10(conf-pmap-c-que)# exit
OS10(conf-pmap-queuing)# exit
OS10(config)# system qos
OS10(conf-sys-qos)# service-policy output solar
View QoS system
OS10(conf-sys-qos)# do show qos system
Service-policy (output)(queuing): solar
Enable strict priority on interface
OS10(config)# interface ethernet 1/1/5
OS10(conf-if-eth1/1/5)# service-policy output type queuing solar
View policy-map
OS10(conf-if-eth1/1/5)# do show policy-map
Service-policy(queuing) output: solar
Class-map (queuing): magnum
priority
Buffer management
OS10 devices distribute the total available buffer resources into two buffer pools at ingress direction and three buffer pools at
egress direction of all the physical ports.
All ports in a system are allocated a certain amount of buffers from corresponding pools, based on the configuration state of
each priority-group or queue. The remaining buffers in the pool are shared across all similarly configured ports.
The following buffer pools are available:
● Ingress buffer pools:
○ Lossy pool (default)
○ Lossless pool (PFC)
● Egress buffer pools:
○ Lossy pool (default)
○ Lossless pool (PFC)
○ CPU pool (CPU control traffic)
For example, when all ports are allocated reserved buffers from the lossy (default) pool, the remaining buffers in the lossy pool
are shared across all ports, except the CPU port.
When you enable priority flow control (PFC) on the ports, all the PFC enabled queues and priority-groups use the buffers from
the lossless pool.
OS10 dedicates a separate buffer pool for CPU traffic. All default reserved buffers for CPU port queues are from the CPU pool,
and the remaining buffers are shared across all CPU queues. You can modify the buffer settings of CPU queues.
OS10 allows configuration of buffers per priority-group and queue for each port.
The buffer usage accounting happens for ingress packets on ingress pools and egress packets on egress pool. You can configure
ingress packets buffer accounting per priority-group and egress packet buffer accounting per queue level.
Configure ingress buffer
Default settings
In the default settings for ingress buffers, all traffic classes are mapped to the default priority group and the buffers are
reserved per default priority group ID 7. All buffers are part of the default pool and all ports share buffers from the default pool.
The reserved buffer size is 9360 bytes for the speed of 10G, 25G, 40G, 50G, and 100G. The supported speed varies for
different platforms.
Quality of service
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