This is the first (to the authors' knowledge) free and open-source implementation of a RMON2 network monitoring agent available. The implementation focuses on RFC-2021, with protocolDir, protocolDist, nlHost, nlMatrix, alHost and alMatrix groups already functional.
There is also a module suitable for loading into Net-SNMP via dlmod.
An prototype support for an extension, known as ID-Trace, is under development. This extension enables the agent to do stateful inspection on packets, coded with the Protocol Trace Specification Language (PTSL) and without breaking the RMON2 MIB semantics.