How to find nodes with SNMP failures that still ping?

We changed an NPM server's IP last year and just found a node that hasn't had a successful SNMP poll since.  I assume it's configured to only allow a single IP to monitor it, which is no big deal to fix.

My question is: How can I find other devices with these sort of issues in NPM?  The device pings successfully, so it never triggers an error, but it hadn't been reporting any SNMP data for over a year.

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