Yes, you have to add the missing OIDs if you want the devices the be classified successfully. I have noticed that ServiceNow does update the table via release upgrades/patches and the Discovery and Service mapping Patterns plugin but I don't know the update frequency.
If you view the SNMP OID Classifications [discovery_snmp_oid] table and add the column named "Application", you should be able to determine if it was from a release or plugin.
Here is a related question with a response from @doug_schulze explaining the issues of keeping the OID table up to date.
Yes, you have to add the missing OIDs if you want the devices the be classified successfully. I have noticed that ServiceNow does update the table via release upgrades/patches and the Discovery and Service mapping Patterns plugin but I don't know the update frequency.
If you view the SNMP OID Classifications [discovery_snmp_oid] table and add the column named "Application", you should be able to determine if it was from a release or plugin.
Here is a related question with a response from @doug_schulze explaining the issues of keeping the OID table up to date.
