I've got the FibreAlliance-pluggin successfully running, but unfortunately without trend/performanece data [snip]

Send performance data separately for better control

trends rrdfile hostname data

Check if the .rrd-files have appeared in the ~xymon/data/rrd/HOSTNAME/ directory - if they have, then it's an issue of setting up graphs.cfg with the graph definitions, and updating the TEST2RRD and GRAPHS settings in xymonserver.cfg.

If there are no rrd-files, then your plugin-script has a problem.

Regards, Henrik