VMware Aria Operations for Networks collects NSX router metrics to monitor the NAT (Network Address Translation) rules configured on the router.

Metric Name Metric API Name DesMetrics for NSX-T Logical Portcription
Flow Packets net.packet.delta.summation.number Sum of packets of all the NAT rules which are present on the logical router.
Session Count net.connection.delta.summation.number Sum of connections of all the NAT rules which are present on the logical router.
Total Bytes net.byte.delta.summation.number Sum of bytes of all the NAT rules which are present on the logical router.