Part of eDirectory health checking is to monitor the status of the eDirectory Daemon on each server in the environment.
I've put together a Nagios check script which can be used by system administrators to monitor whether there is a problem with the eDirectory Daemon on a server.
The script is hosted on the Monitoring Exchange and can be directly accessed here.
Disclaimer: As with everything else at Cool Solutions, this content is definitely not supported by Novell (so don't even think of calling Support if you try something and it blows up).
It was contributed by a community member and is published "as is." It seems to have worked for at least one person, and might work for you. But please be sure to test, test, test before you do anything drastic with it.