NSX Application Platform is disconnected from the NSX management cluster

Products

• VMware NSX
• VMware vDefend Firewall with Advanced Threat Prevention

Issue/Introduction

NSX Manager may display an alarm indicating that the NSX Application Platform (NAPP) is disconnected, even though NAPP is not installed or has been previously uninstalled.

Environment

NAPP 4.2.0.0

Cause

This issue can occur due to outdated or incorrect nameserver IPs present in the system configuration. These stale DNS entries can result in false alarm generation during operations such as upgrades or health checks.

Resolution

 

   1. SSH into all the NSX Manager nodes using root credentials.

   2. Check the DNS configuration file using:

      cat /etc/resolv.conf

  3. Review the nameserver entries and update them to valid, reachable DNS IP addresses by editing the file:

      vi /etc/resolv.conf

   4. Save the file and exit.

 

Additional Information

 

• No NAPP-related services or plugins need to be present for this alarm to occur.

• Ensuring that valid DNS servers are configured will prevent the alarm from reappearing.

If you verified the above and the issue still persists please refer to the following related knowledge base articles:

https://knowledge.broadcom.com/external/article/378726/troubleshooting-nsx-application-platform.html

https://knowledge.broadcom.com/external/article/377378/the-nsx-application-platform-cluster-is.html

 

If the issue continues after following the above steps, please contact Broadcom Support for further assistance.