Users Guide

NOS(config-pmap-network-qos)# class llfc
NOS(config-pmap-c-nqos)# pause buffer-size 100 pause-threshold 50 resume-threshold 10
NOS(config-pmap-c-nqos)# end
NOS# configure terminal
NOS(config)# interface range ethernet 1/1/1,1/1/2,1/1/3
NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# flowcontrol transmit on
NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# flowcontrol receive on
NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# service-policy input type network-qos llfc
NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# end
WRED/ECN configuration — ToR device
NOS# configure terminal
NOS(config)# wred w1
NOS(config-wred)# random-detect ecn
NOS(config-wred)# random-detect color green minimum-threshold 100 maximum-threshold 500
drop-probability 100
NOS(config-wred)# random-detect color yellow minimum-threshold 100 maximum-threshold 500
drop-probability 100
NOS(config-wred)# random-detect color red minimum-threshold 100 maximum-threshold 500
drop-probability 100
NOS(config-wred)# exit
NOS(config)# class-map type queuing cq
NOS(config-cmap-queuing)# match queue 5
NOS(config-cmap-queuing)# exit
NOS(config)# policy-map type queuing pq
NOS(config-pmap-queuing)# class cq
NOS(config-pmap-c-que)# random-detect w1
NOS(config-pmap-c-que)# end
NOS# configure terminal
NOS(config)# interface range ethernet 1/1/1,1/1/2,1/1/3
NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# flowcontrol receive off
NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# priority-flow-control mode on
NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# ets mode on
NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# service-policy input type network-qos policy5
NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# service-policy output type queuing pq
NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# trust-map dot1p t1
NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# end
Enable DCBx — ToR device
OS10# configure terminal
OS10(config)# dcbx enable
Buffer statistics tracking
OS10 offers the Buffer Statistics Tracking (BST) feature to observe buffer usage across the switch without any impact to
performance. This feature maintains separate sets of counters for buffer usage accounting:
● Ingress priority-group
● Ingress service-pool
● Ingress shared-headroom-pool
● Egress queue
● Egress service-pool
You can obtain a snapshot of the buffer statistics for the different buffer objects, such as a snapshot of all ingress priority-
groups associated to a port, all egress unicast queues bound to a port, and so on.
You can enable BST at the global level. OS10 tracks buffer utilization and provides the maximum peak statistics value over a
period of time and the current value of the monitored BST counter.
Use the buffer-statistics-tracking command in SYSTEM-QOS mode to enable BST:
OS10# configure terminal
OS10(config)# configure system-qos
OS10(config-sys-qos)# buffer-statistics-tracking
Clear the counter
Quality of service
1345