SNMP Device Not Discovered Due to Missing OID Classifier for Custom or Third-Party Device<!-- /*NS Branding Styles*/ --> .ns-kb-css-body-editor-container { p { font-size: 12pt; font-family: Lato; color: var(--now-color--text-primary, #000000); } span { font-size: 12pt; font-family: Lato; color: var(--now-color--text-primary, #000000); } h2 { font-size: 24pt; font-family: Lato; color: var(--now-color--text-primary, black); } h3 { font-size: 18pt; font-family: Lato; color: var(--now-color--text-primary, black); } h4 { font-size: 14pt; font-family: Lato; color: var(--now-color--text-primary, black); } a { font-size: 12pt; font-family: Lato; color: var(--now-color--link-primary, #00718F); } a:hover { font-size: 12pt; color: var(--now-color--link-primary, #024F69); } a:target { font-size: 12pt; color: var(--now-color--link-primary, #032D42); } a:visited { font-size: 12pt; color: var(--now-color--link-primary, #00718f); } ul { font-size: 12pt; font-family: Lato; } li { font-size: 12pt; font-family: Lato; } img { display: ; max-width: ; width: ; height: ; } } Issue A device is reachable via SNMP and probes return data successfully, but no CI is created in the CMDB. Discovery stalls at the classification phase because no SNMP OID classifier is mapped to the device's sysObjectID. Symptoms SNMP probes return data from the target device successfully.No CI is created in the CMDB after Discovery completes.Discovery stalls or exits at the classification phase with no CI output.The SNMP OID Classification table does not contain an entry for the device's sysObjectID.Discovery logs show classification was attempted but no classifier matched. Cause Discovery requires a matching SNMP OID classifier for each device's sysObjectID before it can determine the appropriate CI class and proceed with CI creation. If no classifier is mapped to a device's sysObjectID (for example, a custom or third-party device with a proprietary OID), Discovery cannot classify the device and will not create a CI. This is expected behavior — only devices with a matching classifier in the SNMP OID Classification table will result in a CI. Resolution Navigate to Discovery > SNMP OID Classifications and confirm that no entry exists for the device's sysObjectID.Create a new SNMP OID Classification record and set the sysObjectID to the value returned from the device (for example, 1.3.6.1.4.1.49011).Map the classifier to an appropriate CI class based on the device type (for example, cmdb_ci_linux_server or a custom class).Save the record and re-run Discovery against the device.Confirm that Discovery now classifies the device and creates a CI in the CMDB. Note: If the appropriate CI class does not exist for the device type, a custom CI class extension may be required before mapping the classifier.