Hi Murrant,
Please find below result for “crasEmailNumSessions” with OID “1.3.6.1.4.1.9.9.392.1.3.23” and “crasSVCNumSessions” with OID “1.3.6.1.4.1.9.9.392.1.3.35”.
You can see 192.168.1.1 didn’t support “crasEmailNumSessions” query, so it will occur error with existing module.
[root@librenms:~]$ snmpwalk -v 2c -c public 192.168.1.1 1.3.6.1.4.1.9.9.392.1.3.23
SNMPv2-SMI::enterprises.9.9.392.1.3.23 = No Such Object available on this agent at this OID
[root@librenms:~]$ snmpwalk -v 2c -c public 192.168.1.1 1.3.6.1.4.1.9.9.392.1.3.35
SNMPv2-SMI::enterprises.9.9.392.1.3.35.0 = Gauge32: 11
[root@librenms:~]$ snmpwalk -v 2c -c public 192.168.2.1 1.3.6.1.4.1.9.9.392.1.3.23
SNMPv2-SMI::enterprises.9.9.392.1.3.23.0 = Gauge32: 0
[root@librenms:~]$ snmpwalk -v 2c -c public 192.168.2.1 1.3.6.1.4.1.9.9.392.1.3.35
SNMPv2-SMI::enterprises.9.9.392.1.3.35.0 = Gauge32: 41