With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
natSessionPrivateDstEPBindId
nat Session Private Dst EP Bind Id
1.3.6.1.2.1.123.1.9.1.4
The bind id associated between private and public destination end points.
Back to NAT-MIB MIB page.
IPHost Network monitor allows you to monitor natSessionPrivateDstEPBindId on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.