With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cagwInstancePhysicalIndex
Cisco's ASN Gateway Instance Physical Index
1.3.6.1.4.1.9.9.638.1.1.1.1.2
The entPhysicalIndex of the physical entity for which the ASN Gateway measurements in this entry are maintained. The exact type of this entity is described by its entPhysicalVendorType value.
Back to CISCO-ASN-GATEWAY-MIB MIB page.
IPHost Network monitor allows you to monitor cagwInstancePhysicalIndex 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.