Credential Based Discovery VS SNMP based

[Suvetha S]

I would like to understand what ServiceNow uses for discovery and how it differs from SNMP based Discovery. We want to understand why SNMP is not the default mechanism and what we would get or miss if we were to use SNMP as default. For ex:- if we are going to Discover Windows server using SNMP only and not WMI what would we miss? If we have to move from WMI to SNMP what additional steps to be performed? 

Currently we are using traditional Credential discovery. Please advice. 

[palanikumar]

SNMP will return only limited data as compared to Credential based discovery. You will not get key information like installed software and many more data

[AJ-TechTrek]

Hi @Suvetha S ,

SNMP based discovery mostly used for Network Device as Network Device works on SNMP Protocol, You can Discover the Windows or Linux Server with SNMP but you need to disable the WMI and SSH Port and Protocols and then you can run the windows and Linux Discovery with SNMP (Port 161) But it will fetch the limited data fromDevices as SNMP OID is not available for all Data for linux and Windows Server.

Best Practices is use the OOB Port and Protocols with Defined Credentials for other than SNMP Device like Network (Router, Switch etc)

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AJ

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[Suvetha S]

@AJ-TechTrek  Can you please elaborate what limited data means? What are all the key attributes we will be missing? 

[AJ-TechTrek · Accepted solution]

Hi @Suvetha S ,

limited data means it will discover the class of Device, Serial Number and Operation system only as OOB with SNMP protocols but Not able to discover the OS Version, CPU details , RAM and Storage details , also not able to create the relationship.

For that you need to customize much the pattern to get the data using SNMP.

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Thanks

AJ

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