Symptoms:
VMware vRealize Operations 8.10.x
VMware vRealize Operations 8.6.x
There is a limit in SNMP if the interfaces are virtualized where metrics will not be collected for more than 17 interfaces.
Enable NX-API on the Cisco device, this will allow the TVS MP for Cisco Networking to collect metrics for all interfaces.
The necessary documentation to enable Cisco NX-API can be found on the Cisco web-site located here.