Unable to see segments created by NSX on vCenter

Products

• VMware NSX

Issue/Introduction

• Segments created on the NSX side is not reflecting on the vCenter 
• Communication between the NSX manager and vCenter fails.
• The nslookup from the NSX to vCenter is unsuccessful
• Might notice below log entries on syslog of NSX manager
  

  "[nsx@6876 comp="nsx-manager" level="WARNING" subcomp="manager"] Error occurred while getting dvpg info for cm 530c####-5493-####-9915-####84a7####, managed object ManagedObjectReference: type = Vmware DistributedVirtualSwitch, value dvs-11, serverGuid= null, Local ids null with query VDS com.vmware.vim.vmomi.client.exception.ConnectionException: invocation failed with "java.net.UnknownHostException: vcsa.vmware.com" at com.vmware.vim.vmomi.client.common.impl.ResponseImpl.setError (ResponseImpl.java:265) "

Environment

VMware NSX

Cause

This issue might occur due to one of the reasons

• Connectivity issues between the NSX Manager to vCenter Server.
• DNS resolution is not working on NSX Manager.

Resolution

To troubleshoot this issue:

1. Verify and fix the connectivity from the NSX Manager to the vCenter Server.
2. Validate and rectify if any DNS issues on the NSX manager