ServiceNow Discovery Error

S_V_N_VENKATESH
Tera Contributor

4 hours ago - last edited 4 hours ago

 Linux server is being incorrectly classified as an Out-of-Band (OOB) device. What could be the possible causes and help me to resolve the issue. I have verified the audit history for the servers which were affected and could see for the same server's name there are 2 records created and the field "IP Address" value is changing continously, Class is flipping from "Linux server" to "OutofBandDevice".

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shubhamseth
Giga Sage

3 hours ago

@S_V_N_VENKATESH 

 

What to Check

  1. Review Identification Simulation for the affected CI.
  2. Check Identification Rules for both:
    • cmdb_ci_linux_server
    • OOB/network device classes
  3. Review Discovery Source and sys_object_source records.
  4. Check if multiple data sources are updating the same CI.
  5. Verify DNS forward/reverse lookups for the hostname.
  6. Review Discovery Logs to determine which classifier is promoting the CI to the OOB class.

 

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S_V_N_VENKATESH
Tera Contributor
In response to shubhamseth

3 hours ago

Check if multiple data sources are updating the same CI.

Yes, I could see there are 2 servers which were affected, and for those 2 servers duplicates were created with "Out-of-Band Device" class for which the source is "ServiceNow". Actual records from the class "Linux server" are coming from the source "IEDS Allmid XML"

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