UDT requires SNMP data from ‘vmMembershipSummaryExtTable’ (ODI 1.3.6.1.4.1.9.9.68.1.2.3) to collect Layer 2 data for switch port numbers higher than 2048.
This data is then used for collecting SNMP data from The dot1dTpFdbTable (OID 1.3.6.1.2.1.17.4.3).
Without support for vmMembershipSummaryExtTable Cisco 6800 IA switches can not be monitored using Solarwinds NPM and UDT.
Solarwind Tech support reply is
I have checked with development and can confirm that UDT does not currently support the vmMembershipSummaryExtTable.