Stale "IP pool usage of <IP pool ID> very high" alarm and the IP pool doesn't exist.

Products

• VMware NSX

Issue/Introduction

• An alert is triggered indicating very high IP pool usage within the environment. 
• A search for the IP pool returns no results. 

Environment

• VCF 9.0.1.0
• VMware NSX 

Cause

A stale IP pool alarm in Corfu database. 

Resolution

Perform a rolling reboot of the NSX manager nodes. 

1. Reboot the first NSX Manager.
2. SSH to a Manager as admin user and check cluster health: get cluster status
3. When all services report up on all 3 NSX Manager nodes, reboot the next Manager.
4. Repeat steps 2-3 for the third Manager.