On PTX10K running 22.4R3-S3-EVO, show interfaces extensive displays active link alarms , whereas monitor interfaces displays None despite of active link alarms on the interface. The behavior is different in Junos where link fault alarm is present in both the monitor interface and in the show interfaces extensive output.

root@router-re0> show interfaces et-1/1/1 extensive | match Active

Active alarms : LINK

Active defects : LINK, REMOTE-FAULT

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root@router-re0> monitor interface et-1/1/1

router-re Seconds: 2 Time: 21:58:38

Interface: et-1/1/1, Enabled, Link is Down

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Active alarms : None

Active defects: None

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Engineer confirmed this feature is not implemented, so it will display None in EVO. Fix will be provided in later releases.