Cisco Nexus 7000 Series Command Reference Manual page 81

Cisco Nexus 7000 Series NX-OS Quality of Service Commands
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m .
Command History Release
4.0
Usage Guidelines
The random-detect cos-based command is required when you configure WRED to establish default
thresholds for class of service (CoS) values for which you do not define specific thresholds.
The minimum and maximum threshold units must match.
The system drops packets that exceed the minimum threshold at an increasing rate as the maximum
threshold is reached. By default, the units are in packets,
WRED and tail drop cannot be configured in the same class. For information about configuring tail drop,
see the queue-limit command.
Note You cannot configure WRED on ingress 10-Gigabit Ethernet ports.
This command does not require a license.
Examples This example shows how to configure WRED for a queue by setting the default WRED thresholds
followed by thresholds that apply to CoS values 5 and 7:
switch(config)# policy-map type queuing match-first my_queue
switch(config-pmap-que)# class type queuing 1p3q4t-out-pq1
switch(config-pmap-c-que)# random-detect cos-based aggregate 10 mbytes 20 mbytes
switch(config-pmap-c-que)# random-detect cos 5,7 15 mbytes 20 mbytes
switch(config-pmap-c-que)#
This example shows how to configure WRED for a queue by setting the default WRED thresholds
followed by queue buffer size thresholds that apply to CoS value 5:
switch(config)# policy-map type queuing match-first my_queue
switch(config-pmap-que)# class type queuing 1p3q4t-out-pq1
switch(config-pmap-c-que)# random-detect cos-based aggregate 10 mbytes 20 mbytes
switch(config-pmap-c-que)# random-detect cos 5 percent 5 percent 15
switch(config-pmap-c-que)#
This example shows how to remove a WRED configuration from a policy map queuing class:
switch(config)# policy-map type queuing match-first my_queue
switch(config-pmap-que)# class type queuing 1p3q4t-out-pq1
switch(config-pmap-c-que)# no random-detect cos-based aggregate 10 mbytes 20 mbytes
switch(config-pmap-c-que)# no random-detect cos 5 percent 5 percent 15
switch(config-pmap-c-que)#
Related Commands Command
random-detect
queue limit
show policy-map
OL-23378-01
Modification
This command was introduced.
Description
Configures WRED.
Configures tail drop.
Displays policy maps and statistics.
Cisco Nexus 7000 Series NX-OS Quality of Service Command Reference, Release 5.x
random-detect cos-based
QOS-71