Don’t forget to remove dust from the inlet ports on your Catalyst 4500 chassis on a routine basis if they exist in locations where they are exposed to large amounts of particulates. You don’t want to be woken up at 6:19AM by a downed device.

Mar 18 06:19:40 1.2.3.4 : %C4K_IOSMODPORTMAN-2-MODULESHUTDOWNTEMP: Module 1 Sensor air outlet temperature is at or over shutdown threshold - current temp: 86C, shutdown threshold: 86C
Mar 18 08:25:23 1.2.3.4 : %C4K_IOSMODPORTMAN-2-MODULESHUTDOWNTEMP: Module 1 Sensor air outlet temperature is at or over shutdown threshold - current temp: 86C, shutdown threshold: 86C.
Mar 18 09:34:49 1.2.3.4 : %C4K_IOSMODPORTMAN-2-MODULESHUTDOWNTEMP: Module 1 Sensor air outlet temperature is at or over shutdown threshold - current temp: 86C, shutdown threshold: 86C

Sadly the Syslog events never made it to our central repository. Our solution for the first automated shutdown was to simply power the device back on to enable connectivity for the building. After two more instances of shutting itself off, we reviewed the logs on the local device and discovered that they never reached out syslog server.

A simple wipe of accumulated dust saw our temperature take a drastic drop.