Changing From 8Q Mode To 4Q Mode; Guidelines And Limitations; Configuring An Mqc Object; Configuring Or Modifying A Class Map - Cisco Nexus 9000 Series Configuration Manual

Changing from 8q Mode to 4q Mode

Changing from 8q Mode to 4q Mode
Note Changing from 8q mode to 4q mode is not supported on the Cisco Nexus 9508 switch (NX-OS 7.0(3)F3(3)).
Use the following guidelines to change from 8q mode to 4q mode:
• Ensure that none of the active input QoS policies have set qos-group action for qos-groups 4-7, so that
• Ensure that all 8q interface policies and 8q system level policies are replaced with corresponding 4q
• Replace the 8q network-qos policy with a corresponding 4q policy.

Guidelines and Limitations

Modular QoS has the following configuration guidelines and limitations:
• Eight QoS groups are supported only on modular platforms with the Cisco Nexus 9300 N9K-M4PC-CFP2

Configuring an MQC Object

When you specify an MQC object command, the device creates the object if it does not exist and then enters
map mode.
To remove a class-map or policy-map object, use the no form of the command that you used to create the
object.

Configuring or Modifying a Class Map

You can create or modify a class map. You can then reference class maps in policy maps.
Note You cannot create a queuing class map; you must use one of the system-defined queuing class maps.
Cisco Nexus 9000 Series NX-OS Quality of Service Configuration Guide, Release 7.x
28
Class-map (qos): c3 (match-all)
Match: dscp 30
set qos-group 7
no traffic flows towards queues 4-7.
policies.
uplink module, and the following Cisco Nexus 9500 platform line cards:
• N9K-X9432PQ
• N9K-X9464PX
• N9K-X9464TX
• N9K-X9636PQ
Using Modular QoS CLI