MRTGEXT was originally written as an NLM for Novell Netware to obtain values used with the widely known MRTG (predecessor of cacti, which is the base of op5 Statistics), but it can also be polled from Monitor. For detailed info about this release see the changelog.
See the MRTGEXT 1.46b README for installation and usage instructions.
Note: The MRTGEXT NLM listens to port 9999 by default. This means that you need to open any firewalls for port 9999/tcp to be able to communicate with the client. You can also change the port when loading the NLM, see readme.txt for more info.