Symptom
A switch configured with "feature macsec" returns "Not Applicable" for "show license usage".
Conditions
This behavior is known to affect Nexus 9000 devices configured with "feature macsec".
Workaround
Configuring a MACsec keychain on an interface causes "show license usage" to return the correct value. However, this is not explained in our documentation.
Further Problem Description
The following item should be added to "Guidelines and Limitations for MACsec" for 10.2(x) and newer code:
"In addition to enabling the MACsec feature, a MACsec keychain must be configured on at least one interface for the security add-on license to be consumed."
https://www.cisco.com/c/en/us/td/docs/dcn/nx-os/nexus9000/102x/configuration/Security/cisco-nexus-9000-nx-os-security-configuration-guide-102x/m-configuring-macsec.html
