ACI NTP error not clearing - F1574

[anthony-warren]

I am working with a new-to-me environment and trying to work through some of the outstanding health issues discovered.

Current issue of focus is NTP fault F1574 that appears to be stuck in Raised state for Node 2.

From what I can see policy is all OK

Checking outputs from the following also looks to match between node1 and node1:

show clock
ps -aux | grep ntp
show ntpq
cat /etc/ntp.conf
ntpstat
ntpq -pn

Obviously it's a long-standing fault record, so is there a way to clear it out and see if it returns ?  Or, any other troubleshooting steps that can be taken?

Thanks in advance!

[AshSe]

Dear @anthony-warren  

To clear the NTP fault F1574 that appears to be stuck in the Raised state for Node 2 in your Cisco ACI fabric, you can follow these steps:

Step 1: Verify NTP Configuration

First, ensure that the NTP configuration is correct and that the NTP servers are reachable from Node 2.

1. Check NTP Configuration:

   • Log in to the APIC GUI.
   • Navigate to Fabric > Fabric Policies > Policies > Pod > Date and Time > Policy default 
   • Verify that the NTP servers are correctly configured.

2. Check NTP Status on Node 2:

   • SSH into Node 2 (Leaf or Spine switch).
   • Run the following command to check the NTP status:

   

   1. • Ensure that the NTP peers are reachable and synchronized.

   Step 2: Clear the Fault

   If the NTP configuration is correct and the NTP servers are reachable, but the fault is still stuck, you can try to clear the fault manually.

   1. Clear the Fault via APIC GUI:

• Log in to the APIC GUI.
• Navigate to Fabric > Inventory > Pod > Node 2 > Faults.
• Locate the fault F1574 and try to acknowledge or clear it.

2. Clear the Fault via CLI:

• SSH into the APIC.
• Use the following commands to clear the fault:

• This will list the fault instances. Note the dn (Distinguished Name) of the fault.
• Use the following command to clear the fault:

3. Clear the Fault via API:

• You can also use the REST API to clear the fault. Here’s an example using curl:

1. 1. Replace <APIC_IP> with the IP address of your APIC, admin:password with your APIC credentials, and <fault_dn> with the actual DN of the fault.

Step 3: Restart NTP Service

If the fault persists, you can try restarting the NTP service on Node 2.

1. Restart NTP Service:
   • SSH into Node 2.
   • Run the following commands to restart the NTP service:

   

   Step 4: Reboot Node 2 (if necessary)

   As a last resort, if the fault is still stuck, you may consider rebooting Node 2. This should be done during a maintenance window as it will cause a temporary disruption.

   1. Reboot Node 2:
      • SSH into Node 2.
      • Run the following command to reboot the node: