Re: Best Practices for vMotion QoS in N1kv and UCS?
Yes. You can use the modified QoS policy which changes the COS Values.
We need to do some more configuration in Fabric Interconnect for the COS Values that are modified by Nexus 1000v to keep it as it is.
The M81KR adapter works in a “no trust” QoS model which means that it will overwrite the CoS value set by an upstream entity (Nexus 1000v for example). For Nexus1000v deployments, it is highly recommended to do the CoS marking at the Nexus 1000v level. This means changing the QoS model to “trust” on the M81KR.
To create a QoS policy to achieve this, look into the attached file. We need to have option "Full" enabled in it.
Here are further details about this configuration from UCS Manager help:
Host Control field
Whether Cisco UCS controls the class of service (CoS). This can be:
None—Cisco UCS uses the CoS value associated with the priority selected in the Priority drop-down list regardless of the CoS value assigned by the host.
Full—If the packet has a valid CoS value assigned by the host, Cisco UCS uses that value. Otherwise, Cisco UCS uses the CoS value associated with the priority selected in the Priority drop-down list.
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