Environment

• Zabbix Version: 7.0.17
• OS: Ubuntu 24.04 LTS
• Deployment: VMs
• Database: PostgreSQL
• Frontend Browser: Microsoft Edge - Version 139.0.3405.125

When an IPMI-monitored host encounters connectivity (switch side) or authentication issues (e.g., firewall blocks the port, credentials change), the IPMI interface in the Zabbix GUI does not turn red (checked by zabbix[host,ipmi,available] item).
However, Zabbix server logs show IPMI errors such as:

IPMI host: [16777411] Unknown error 16777411

This creates a false impression that monitoring is working, while it is actually failing.

Steps to Reproduce

1. Configure an IPMI interface for a monitored host with valid credentials.
2. Confirm that IPMI checks are working correctly.
3. Introduce a connectivity issue, for example:
   • Block the IPMI port on a firewall after successful monitoring.
   • Or shut down the switch port via CLI.
4. Wait for the next IPMI check cycle.

Result

• The IPMI interface in the Zabbix GUI remains green.
• Zabbix server logs show:
  IPMI host: [16777411] Unknown error 16777411
• No visual indication in the frontend that IPMI monitoring is failing.

Expected Behavior

• The IPMI interface in the GUI should turn red (DOWN) after the configured number of retries/timeouts, similar to what happens when the IPMI cable is physically disconnected.

Additional Information

• Works as expected if the IPMI cable is unplugged (interface turns red).
• Issue occurs only when the failure is due to firewall, switch port shutdown, or credential changes.