With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
natInterfaceServiceType
nat Interface Service Type
1.3.6.1.2.1.123.1.3.1.2
An indication of the direction in which new sessions are permitted and the extent of translation done within the IP and transport headers.
Back to NAT-MIB MIB page.
IPHost Network monitor allows you to monitor natInterfaceServiceType on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.