NSX Manager logs report false positive duplicate IP address

Products

• VMware NSX for vSphere

Issue/Introduction

• The vsm.log file of the NSX Manager reports of a duplicate IP address exist.
• You see entries similar to:
  
  2018-01-14 11:00:04.311 CET INFO http-nio-127.0.0.1-7441-exec-258 SystemEventDaoImpl:125 - [SystemEvent] Time:'Sun Jan 14 11:00:04.061 CET 2018', Severity:'Critical', Event Source:'vShield Manager', Code:'320001', Event Message:'The NSX Manager IP aaa.bbb.ccc.ddd has been assigned to another machine with the MAC Address xx:xx:xx:xx:xx:xx.', Module:'vShield Manager', Universal Object:'false'
  ./logs/management_service/vsm.log.9
   
• The offending MAC address reported is the NSX Manager MAC address.
  
  Note: The preceding log excerpts are only examples. Date, time, and environmental variables may vary depending on your environment.

Environment

VMware NSX for vSphere 6.3.x

Cause

This issue occurs because as part of the duplicate IP detection mechanism, the command ifconfig on the NSX Manager is used. At times, the ifconfig command returns distorted string which results into wrong parsing of duplicate IP address.

Resolution

This issue is resolved in VMware NSX for vSphere 6.4.1.