Pool lease allocation failed Alarm

Products

• VMware NSX

Issue/Introduction

Title: Alarm for pool_lease_allocation_failed
Event ID: pool_lease_allocation_failed

Alarm Description

• Purpose: To indicate there are no free IP addresses in a DHCP pool.
• Impact: In this case, the virtual machine intended for network connection will receive an Automatic Private IP Addressing (APIPA) and won't obtain a legitimate IP address from the DHCP server.

Environment

VMware NSX

Resolution

Steps to Resolve

For 4.2.0 and higher

 

Recommended Action:

 

Compare the number of IPs of the DHCP pool to the number of the active VMs. Consider reducing the lease time on the DHCP server configuration if the number of VMs are less than the number of active leases. Also, consider expanding the pool range for the DHCP server by using the below procedure: 

From your browser, log in with admin privileges to an NSX Manager at https://nsx-manager-ip-address.

1. 1. Select Networking > Segments.
   2. Find the segment where you want to configure the DHCP service. Next to the segment name, click …,
   3. Then click Edit.
   4. Click EDIT DHCP Config to modify the following parameters as required.
      1. Enlarge the DHCP range.
      2. Add a new DHCP range.
      3. Modify the Lease Time (seconds) to a lower value.
         1. Note: the default lease is one day or 86400 seconds.
   5. Click Apply.

Additional Information

NSX DHCP Configuration Settings: Reference

NSX-T Data Center REST API