Configuring Congestion Management - Cisco Nexus 9000 Series Configuration Manual

Configuring Congestion Management

DETAILED STEPS
Command or Action
Step 1
configure terminal
Example:
Step 2
policy-map type queuing afd_8q-out
Step 3
class type queuing c-out-8q-q3
Step 4 afd queue-desired <number> [bytes | kbytes |
mbytes] [ecn]
• Configuring AFD without ECN
• Configuring AFD with ECN

Configuring Congestion Management

You can configure only one of the following congestion management methods in a policy map:
• Allocate a minimum data rate to a queue by using the bandwidth and bandwidth remaining commands.
• Allocate all data for a class of traffic to a priority queue by using the priority command. You can use
• Allocate a minimum and maximum data rate to a queue by using the shape command.
In addition to the congestion management feature that you choose, you can configure one of the following
queue features in each class of a policy map:
• Taildrop thresholds based on the queue size and the queue limit usage. For more information, see the
• WRED for preferential packet drops. For more information, see the
Cisco Nexus 9000 Series NX-OS Quality of Service Configuration Guide, Release 7.x
108
switch(config)# policy-map type queuing afd_8q-out
switch(config-pmap-que)# class type queuing c-out-8q-q3
switch(config-pmap-c-que)# afd queue-desired 600 kbytes
switch(config)# policy-map type queuing afd-ecn_8q-out
switch(config-pmap-que)# class type queuing c-out-8q-q3
switch(config-pmap-c-que)# afd queue-desired 150 kbytes ecn
the bandwidth remaining command to distribute remaining traffic among the nonpriority queues. By
default, the system evenly distributes the remaining bandwidth among the nonpriority queues.
section.
Configuring Tail Drop on Egress Queues, on page 102
Queues section.
Configuring Queuing and Scheduling
Purpose
Enters global configuration mode.
Configures the policy map of type queuing.
Configures the class map of type queuing and then enters
policy-map class queuing mode.
Specifies desired queue.
Configuring WRED on Egress