With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
natInterfaceRowStatus
nat Interface Row Status
1.3.6.1.2.1.123.1.3.1.7
The status of this conceptual row. Until instances of all corresponding columns are appropriately configured, the value of the corresponding instance of the natInterfaceRowStatus column is 'notReady'. In particular, a newly created row cannot be made active until the corresponding instance of natInterfaceServiceType has been set. None of the objects in this row may be modified while the value of this object is active(1).
Back to NAT-MIB MIB page.
IPHost Network monitor allows you to monitor natInterfaceRowStatus on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.