With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
chassisSerialNumberString
chassis Serial Number String
1.3.6.1.4.1.9.5.1.2.19
will return the chassis serial number for any chassis that either a numeric or an alphanumeric serial number is being used.
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor chassisSerialNumberString on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.
