With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
natAddrMapIndex
nat Addr Map Index
1.3.6.1.2.1.123.1.4.1.1
Along with ifIndex, this object uniquely identifies an entry in the natAddrMapTable. Address map entries are applied in the order specified by natAddrMapIndex.
Back to NAT-MIB MIB page.
IPHost Network monitor allows you to monitor natAddrMapIndex on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.