Users Guide

2. Configure WRED threshold parameters for different colors in WRED CONFIGURATION mode.
OS10(config-wred)# random-detect color yellow minimum-threshold 100 maximum-threshold
300 drop-probability 40
3. Configure the exponential weight value for the WRED profile in WRED CONFIGURATION mode.
OS10(config-wred)# random-detect weight 4
4. Configure the ECN threshold parameters in WRED CONFIGURATION mode.
OS10(config-wred)#random-detect ecn minimum-threshold 100 maximum-threshold 300 drop-
probability 40
5. Exit WRED CONFIGURATION mode.
OS10(config-wred)#exit
6. Create a QoS class-map.
OS10(config)# class-map type queuing example-cmap-wred-1
OS10(config-cmap-queuing)# match queue 2
7. Enter QOS POLICY-MAP mode and create a queuing policy type.
OS10(config)#policy-map type queuing example-pmap-wred-1
OS10(config-pmap-queuing)# class example-cmap-wred-1
8. Assign a WRED profile to the specified queue.
OS10(config-pmap-c-que)#random-detect example-wred-prof-1
9. Exit CLASS MAP and POLICY MAP modes.
OS10(config-pmap-c-que)#exit
OS10(config-pmap-queuing)#exit
10. Enter SYSTEM QOS mode.
OS10(config)#configure system-qos
11. Enable ECN globally.
OS10(config-sys-qos)#random-detect ecn
After you enable ECN globally, ECN marks the CE bit of the ECN field in a packet as ECT.
In the S4200–ON Series platform, configure separate thresholds for ECN capable traffic (ECT). If you enable ECN, ECT is
marked based on the configured ECN threshold and non-ECT drops based on the WRED thresholds.
Storm control
Traffic storms created by packet flooding or other reasons may degrade the performance of the network. The storm control
feature allows you to control unknown unicast, multicast, and broadcast traffic on L2 and L3 physical interfaces.
OS10 devices monitor the current level of the traffic rate at fixed intervals, compares the traffic rate with the configured levels,
and drops excess traffic.
By default, storm control is disabled on all interfaces. Enable storm control using the storm-control { broadcast |
multicast | unknown-unicast } rate-in-pps command in INTERFACE mode.
NOTE: This feature is not supported on the Z9332F-ON platform.
● Enable broadcast storm control with a rate of 1000 packets per second (pps) on Ethernet 1/1/1.
OS10(conf-if-eth1/1/1)# storm-control broadcast 1000
NOTE: Storm control configuration is supported only for 16 interfaces on the Z9432F-ON platform.
1554 Quality of service