Nope... no dice. Realtime view shows no data as well. "Storage System Summary View" graphs just have no data plotted on them. Other views like Top Volumes say "No data is currently available for chart".
"dfm host diag" shows that it has snmp connectivity, and I can ssh to the filer from the DFM host as well... so it seems not to be a firewalling issue.
"dfm perf data describe -v system" shows plenty of enabled counters, but the oldest and newest record fields are blank, number of records is zero, and used space is 768 bytes. Max records is 525600.
"dfm perf data retrieve -V "System Basic -d 6000" shows no output... so it's not just a graphing problem, there really seems to be no data to plot.
Any ideas?