With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
natAddrMapName
nat Addr Map Name
1.3.6.1.2.1.123.1.4.1.2
Name identifying all map entries in the table associated with the same interface. All map entries with the same ifIndex MUST have the same map name.
Back to NAT-MIB MIB page.
IPHost Network monitor allows you to monitor natAddrMapName 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.