WRED Configuration Example

As shown in Fig 1, interfaces ge-1/1/1, ge-1/1/2, and ge-1/1/3 are connected to end hosts PC1, PC2, and PC3, respectively. Ports ge-1/1/1 and ge-1/1/12 are ingress ports, while ge-1/1/3 is an egress port. In this example, WRED is configured on ge-1/1/3.

                                                              Fig 1. Configure WRED

Enable WRED

Enable WRED on queue 0 of interface ge-1/1/3.

admin@XorPlus# set interface gigabit-ethernet ge-1/1/3 wred queue 0 enable true
admin@XorPlus# commit
Commit OK.
Save done.

Set Maximum and Minimum Thresholds

Set the maximum threshold to 400 and the minimum threshold to 200 on queue 0 of interface ge-1/1/3.

admin@XorPlus# set interface gigabit-ethernet ge-1/1/3 wred queue 0 max_thresh 400
admin@XorPlus# set interface gigabit-ethernet ge-1/1/3 wred queue 0 min_thresh 200
admin@XorPlus# commit
Commit OK.
Save done.

Set Drop Probability

Set the drop probability to 50% on queue 0 of interface ge-1/1/3.

admin@XorPlus# set interface gigabit-ethernet ge-1/1/3 wred queue 0 drop_probability 50
admin@XorPlus# commit
Commit OK.
Save done.

Enable ECN

Enable ECN (Explicit Congestion Notification) on queue 0 of interface ge-1/1/3.

admin@XorPlus# set interface gigabit-ethernet ge-1/1/3 wred queue 0 ecn_thresh 1
admin@XorPlus# commit
Commit OK.
Save done.