Discovery: Missing UPS Serial Number

[PhilomanR]

I have discovered the UPS (Leibert) using SNMP, but the serial number is empty. The discovery log shows that 

"Rule 5: Searched on <cmdb_ci_hardware> for attributes: serial_number: Skipped Identifier Entry".

Please suggest if you have faced similar issue

[Doci1]

I would start observing related ecc_queue. Does the discovery ecc_queue input for (MultiProbe) "SNMP - Identity Probe" returned the serial number? 

[PhilomanR]

I don't see the <upsAdvIdentSerialNumber oid= in the ecc_queue input for (MultiProbe) "SNMP - Identity Probe

[Selva Arun]

Hi,

To address the issue of the missing serial number during SNMP discovery, here are the steps you can take:

1. Check the SNMP OID for the Serial Number:
• Refer to the Liebert UPS documentation or contact the vendor to confirm the correct OID for the serial number. For example, the OID for the serial number is often 1.3.6.1.4.1.476.1.1.1.1.1.6.
  URL: https://iphostmonitor.com/mib/oids/LIEBERT-UPS-MIB/lcUpsIdentSerialNumber.html
• Use an SNMP walk tool (e.g., snmpwalk) to manually query the UPS and verify if the serial number is being exposed.
  URL: https://community.spiceworks.com/t/emerson-libert-ups-snmp-oids/329438
2. Load the Correct MIB Files:
• Ensure you have the MIB files specific to your Liebert UPS model, which can usually be obtained from the vendor (Vertiv).
  URL: https://www.vertiv.com/en-asia/support/software-download/monitoring/management-information-bases-mib...
• Import these MIBs into your discovery tool to properly interpret the SNMP data.
  URL: https://mibbrowser.online/mibdb_search.php?mib=LIEBERT-UPS-MIB
3. Check the SNMP Configuration on the UPS:
• Log in to the UPS management interface and confirm SNMP is enabled and configured to expose all relevant data, including the serial number.
• Verify the SNMP community strings and permissions to ensure the discovery tool has the necessary access.
  URL (Liebert IntelliSlot Unity Card User Guide): https://usermanual.wiki/Emerson/EmersonLiebertApmOnLineUps1590KwUserGuide679625.2073039933.pdf
4. Review the Discovery Rules:
• Check the discovery rule configuration in your CMDB tool to ensure it is set to capture the serial number attribute and isn’t skipping it.
5. Update the UPS Firmware:
• If the firmware is outdated, update it to the latest version, as newer firmware may resolve SNMP-related issues.
6. Custom Script or Identifier:
• If the serial number is still not being discovered, consider creating a custom identifier or script to query the correct OID and populate the serial number in the CMDB.

Next Steps:

• Run an SNMP walk on the UPS to confirm whether the serial number is being exposed.
• Check the discovery logs for more details on why the serial number is being skipped.

If you believe the solution provided has adequately addressed your query, could you please **mark it as 'Helpful'** and **'Accept it as a Solution'**? This will help other community members who might have the same question find the answer more easily.

Thank you for your consideration.

Selva Arun