EVENT_TRACE-6-ENABLE: Trace already enabled

[johnsonservices]

We purchased 10 C9300 switches.  All of them but one behave the same.  One switch however always displays these lines on boot:

*Feb 18 14:09:04.004: %EVENT_TRACE-6-ENABLE: Trace already enabled.
*Feb 18 14:09:04.004: %EVENT_TRACE-6-ENABLE: Trace already enabled.
*Feb 18 14:09:04.004: %EVENT_TRACE-6-ENABLE: Trace already enabled.
*Feb 18 14:09:04.004: %EVENT_TRACE-6-ENABLE: Trace already enabled.

Even after a factory-reset all and reload of IOS XE Software, Version 17.01.01 and no startup config it will still show these lines upon exiting autoconfig

Is this switch bad?

[Reza Sharifi]

Try disabling cef event and test again

monitor event-trace cef events disable

HTH

[johnsonservices]

I did this "monitor event-trace cef events disable"  upon reboot these are back

*Feb 18 14:09:04.004: %EVENT_TRACE-6-ENABLE: Trace already enabled.
*Feb 18 14:09:04.004: %EVENT_TRACE-6-ENABLE: Trace already enabled.
*Feb 18 14:09:04.004: %EVENT_TRACE-6-ENABLE: Trace already enabled.
*Feb 18 14:09:04.004: %EVENT_TRACE-6-ENABLE: Trace already enabled.

[Leo Laohoo]

Try downgrading to the latest 16.9.X or 16.12.X.

[johnsonservices]

The switch had 16.9 on it with the same errors.  The other 9 switches do not exhibit the behavior.

[Leo Laohoo]

If the errors only appear during boot-up then ignore.
If the same errors appear during normal operations, then it's something else.

[johnsonservices]

It is during boot.  Have not seen it during normal operation.  Why would only 1 switch of the 10 do this?