SNMP Discovery - How to know if a new MIB file needs to be uploaded or not?

[Suggy]

When I discover an IP (Network device), it says  “Active, Couldn’t Classify,” 

Fine!  I will open the Input payload, check the sysObjectID, copy the OID and create a new OID entry in OID table.

Question - how will we know if a MIB file is already there in ServiceNow or not for this OID?

[doug_schulze]

The MIB really doesn't matter at that point, whats missing is a classifier. If you have a device that doesnt have a SNMP SysOID out of the box, then yes if your device responds with that value you can enter it and choose the classifier you want to continue the discovery with.

Now if you have a brand new type of device that isn't discovered out of box and is responsive to SNMP (as it sounds) then you just have to build out said classifiers and associated pattern to discover the attributes you are looking to discover.  Its here where you may need custom Manufacture MIBS to gather specific data.  I talk about it all here..

https://www.servicenow.com/community/itom-articles/create-a-simple-snmp-classifier-the-patterns-edit...

[Suggy]

Hi @doug_schulze can you please provide clarification on 

1. In which scenario I just need to create a new OID

2. In which scenario I need to load a new MIB file