Symptom
C9500X-28C8D switches show the "motherboard serial number" when all other cat9k platforms show the "system serial number" under the show inventory command
Switch>show version
Base Ethernet MAC Address : 80:24:8f:24:88:00
Motherboard Assembly Number : 4DBE
Motherboard Serial Number : FDO2547073K <---------------
Model Revision Number : V02
Motherboard Revision Number : 3
Model Number : C9500X-28C8D
System Serial Number : FDO25470H34
Switch>
Switch>sho inventory
NAME: "Chassis", DESCR: "Cisco Catalyst Series C9500X-28C8D Chassis"
PID: C9500X-28C8D , VID: V01 , SN: FDO2547073K <---------------
Conditions
Issue observed on C9500X-28C8D and C9500X-60L4Dswitches