Symptom

Cat9300 managed by DNAC might reboot unexpectedly due to a corrupted managed timer in the IOSd code when processing macros pushed by DNAC. The below example messages can be found in the crashinfo logs (or in the device console) just before the crash. %AUTOSMARTPORT-5-INSERT: Device Un-Classified Device detected on interface AccessTunnel1, executed CISCO_LAST_RESORT_EVENT %LINEPROTO-5-UPDOWN: Line protocol on Interface AccessTunnel5, changed state to down %LINEPROTO-5-UPDOWN: Line protocol on Interface AccessTunnel6, changed state to down %LINEPROTO-5-UPDOWN: Line protocol on Interface AccessTunnel8, changed state to down %LINEPROTO-5-UPDOWN: Line protocol on Interface AccessTunnel1, changed state to down ... %Software-forced reload Exception to IOS Thread: Frame pointer 0x7FF7CA11D4F0, PC = 0x7FF849D1396C UNIX-EXT-SIGNAL: Aborted(6), Process = ASP Process Creation <<<<<<<<<<<

Conditions

AutoSmart Port (ASP) config pushed by DNAC. 'no macro auto processing' present on some interfaces ASP enabled globally - 'macro auto global processing' is present in running configuration

Workaround

Manually disable ASP on the switch with 'no macro auto global processing'

Further Problem Description