With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
natStatsAddrMapGroup
nat Stats Addr Map Group
1.3.6.1.2.1.123.2.1.5
A collection of address map specific NAT statistics, to aid troubleshooting/monitoring of NAT operation.
Back to NAT-MIB MIB page.
IPHost Network monitor allows you to monitor natStatsAddrMapGroup on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.