Cisco Nexus 7000 Series Configuration Manual page 140

Guidelines and Limitations
• The ingress type QoS policy supports set dscp/cos and set qos-group commands. You can configure
either set dscp/cos or set qos-group command but not both. It is possible to migrate between these
configurations at any time.
• F-Series modules do not support the following commands in a QoS policy:
• set discard-class or match discard-class
• set qos-group or match qos-group
• F Series modules do not support WRED in ingress queuing policies.
• F2 modules do not support CoS-to-queue mapping changes when M1 modules are also installed in the
switch.
• F Series modules and M2 modules support shaping in the priority queue. M1 modules do not support
shaping in the priority queue.
• F-Series modules and M2 modules support shaping in the priority queue. M1 modules do not support
shaping in the priority queue.
• See the following information about the default-nq-8e-4q4q-policy template that support four ingress
buffers:
• The default-nq-8e-4q4q-policy template is supported only with F2 modules.
• When F1 modules are online, the default-nq-8e-4q4q-policy template cannot be attached to the
• When the default-nq-8e-4q4q-policy template is attached to system qos, F1 modules are allowed
• To make software downgrades nondisruptive, the following is required before the software
• The clear qos policies 8e-4q4q command is only supported in the default VDC. Using this command
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system qos.
to come online. However, all interfaces of the F1 modules go to the unallocated pool of the
corresponding VDC.
downgrade:
• All user defined and cloned 8e-4q4q template queuing policies should be detached manually
from all interfaces in each VDC.
• The default-nq-8e-4q4q-policy or the user defined/cloned 8e-4q4q template network-qos policy
should be detached from the system qos.
• All user defined and cloned 8e-4q4q template network-qos policies should be removed manually
from the default VDC.
• All user defined 8e-4q4q template queuing policies should be removed manually from all
VDCs.
• Use the clear qos policies 8e-4q4q command in the default VDC to clear the default 8e-4q4q
template policies. This command clears PPF (Policy Propagation Facility) nodes of 8e-4q4q
template policies.
• After executing clear qos policies 8e-4q4q command, you must perform an in-service software
downgrade (ISSD). If an ISSD is not performed, unexpected results might occur.
in the default VDC also clears the 8e-4q4q policy-maps in non-default VDCs.
Configuring Queuing and Scheduling on F-Series I/O Modules