How do I know if DFM is running properly on a day-to-day basis?
DFM will not alert you if it goes down. However, if you have installed the Fault History drop-in (available from Cisco.com at http://www.cisco.com/pcgi-bin/tablebuild.pl/cw2000-dfm), you will be able to see if the DfmServer process has gone down. (In this case, you might want to change your settings for SNMP timeouts and discovery retries.