Administrator Guide

Layer 2 Switching Commands 723
• drop-prob-scale —The maximum drop probability. Range 0-100. This is the
drop probability for a packet when the maximum threshold is reached.
Above the maximum threshold, 100% of matching packets are dropped.
•
ecn —Enables ECN marking for the selected CoS queues. Packets marked
as ECN capable are not dropped when selected for discard by WRED.
Default Configuration
The table below shows the default green, yellow, and red TCP and non-TCP
minimum/maximum drop thresholds and the green, yellow and red TCP and
non-TCP drop probabilities. The thresholds for each color and CoS queue are
configured independently and may overlap. By default, WRED is not enabled
for any CoS queue and ECN is not enabled for any CoS queue.
Command Mode
Global Configuration mode, Interface Configuration mode (physical and
port-channel), Interface Range mode
User Guidelines
Interface configuration overrides the global configuration.
Queue ID WRED Minimum
Threshold
WRED Maximum
Threshold
WRED Drop
Probability Scale
ECN Enabled
0 40/30/20/100 100/ 90/ 80/100 10/ 10/ 10/ 10 No
1 40/30/20/100 100/ 90/ 80/100 10/ 10/ 10/ 10 No
2 40/30/20/100 100/ 90/ 80/100 10/ 10/ 10/ 10 No
3 40/30/20/100 100/ 90/ 80/100 10/ 10/ 10/ 10 No
4 40/30/20/100 100/ 90/ 80/100 10/ 10/ 10/ 10 No
5 40/30/20/100 100/ 90/ 80/100 10/ 10/ 10/ 10 No
6 40/30/20/100 100/ 90/ 80/100 10/ 10/ 10/ 10 No
2CSNXXX_SWUM204.book Page 723 Monday, January 25, 2016 1:25 PM