Connectivity Guide

6. Enable WRED/ECN on a port.
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# random-detect wred_prof_1
7. Enable WRED/ECN on a service-pool.
OS10(config)# system qos
OS10(config-sys-qos)# random-detect pool 0 wred_prof_1
NOTE: On the S4200–ON Series platform, enable ECN globally only. Also, apply ECN configurations only at the queue level.
You cannot configure ECN at the interface or service-pool levels. If you try to apply the ECN configuration at the interface
or service-pool levels, the configuration is not accepted.
1. Configure a WRED profile in CONFIGURATION mode.
OS10(config)# wred wred_prof_1
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. Enter QOS POLICY-MAP mode and create a queuing policy type.
OS10(config)#policy-map type queuing pol-map-1
7. Create a QoS class for the queuing policy type.
OS10(config-pmap-queuing)#class default
8. Assign a WRED profile to the specified queue.
OS10(config-pmap-c-que)#random-detect prof1
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.
936
Quality of service