When the user sorts on the 'Last Flow' column in 'All Interfaces' page, the sorting happens on string format of the date rather than on epoch time.
NetOps Performance Management releases r20.2.1 or older
To avoid sorting on String format of date, an invisible column is created holding the epoch time in long format which will be sorted when the user sorts on the last flow column.
This is resolved with new code, via defect DE470887, in the r20.2.3 and newer releases of DX NetOps Performance Management.
Search it for DE470887 to see the entry for this issue.
Symptom: When the user sorts on the 'Last Flow' column in 'All Interfaces' page, the sorting happens on string format of the date rather than on epoch time.
Resolution: To avoid sorting on String format of date, an invisible column is created holding the epoch time in long format which is sorted when the user sorts on the last flow column.
(20.2.3, DE470887)