Notes About 8Q Mode; Example Of Changing To 8Q Mode - Cisco Nexus 9000 Series Configuration Manual

System-Defined MQC Objects

Notes About 8q Mode

The following are notes about 8q mode:
• When 8q policies are in active use, the system cannot be downgraded to a system image that does not
support 8q mode.
Note
The following example shows some incompatibilities when trying to downgrade to a system image that
does not support 8q mode.
switch# show incompatibility nxos bootflash:n9000-dk9.6.1.2.I1.2.bin
The following configurations on active are incompatible with
1) Service : ipqosmgr , Capability : CAP_FEATURE_IPQOS_8Q_QUE_POLICY_ACTIVE
Description : QoS Manager - 8Q queuing policy active
Capability requirement : STRICT
Enable/Disable command : Please remove 8q queuing policy
2) Service : ipqosmgr , Capability : CAP_FEATURE_IPQOS_8Q_NQOS_POLICY_ACTIVE
Description : QoS Manager - 8Q network-qos policy active
Capability requirement : STRICT
Enable/Disable command : Please remove 8q network-qos policy
• No 8q policies can be activated on a system that has linecards that do not support 8-queues. All ACI
(Application Centric Infrastructure) capable linecards do not support 8-queues.
Note
The following example shows some of the errors that occur when you attempt to use 8-queue functionality
on a system that has linecards that do not support 8-queues.
switch(config)# system qos
switch(config-sys-qos)# service-policy type queuing output default-8q-out-policy
ERROR: policy-map default-8q-out-policy can be activated only on 8q capable platforms
switch(config)# system qos
switch(config-sys-qos)# service-policy type network-qos default-8q-nq-policy
ERROR: policy-map default-8q-nq-policy can be activated only on 8q capable platforms
switch(config)# policy-map p1
switch(config-pmap-qos)# class c1
switch(config-pmap-c-qos)# set qos-group 7
ERROR: set on qos-group 4-7 is supported only on 8q capable platforms

Example of Changing to 8q Mode

The following is an example of changing to 8q mode:
switch# qos copy policy-map type network-qos default-8q-nq-policy prefix my
switch# show policy-map type network-qos
Cisco Nexus 9000 Series NX-OS Quality of Service Configuration Guide, Release 7.x
22
As a best practice to avoid incompatibilities, remove the 8q policies before a downgrade.
As a best practice, power off all linecards that do not support 8-queues before using
8-queue functionality.
Using Modular QoS CLI
the system image