Manager FQDN reverse lookup failure alarm in NSX Manager
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Manager FQDN reverse lookup failure alarm in NSX Manager

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Article ID: 345817

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Updated On:

Products

VMware NSX

Issue/Introduction

Title: Alarm for communication.manager_fqdn_reverse_lookup_failure
Event ID: communication.manager_fqdn_reverse_lookup_failure

Alarm Description

  • Purpose: The purpose of this alarm is to inform the user that the reverse DNS lookup failed for Manager node's IP address when the publish_fqdns flag is set to true.
  • Impact: When the publish_fqdns flag is set to true, transport nodes should be able to access an NSX Manager using its FQDN instead of IP address.
    • However, this alarm indicates reverse DNS lookup failed for the specific manager node with the given FQDN.

Environment

VMware NSX

Resolution

  • Assign the correct FQDN for each NSX Manager node and verify the DNS is assigned with the NSX Manager node IP address, to ensure a successful reverse lookup.
  • Alternatively, no longer use FQDNs by invoking the NSX API PUT /api/v1/configs/management with publish_fqdns set to false in the request body.
    • Once completed calls from Transport nodes and from Federation to Manager nodes in this cluster will use only IP addresses.

Maintenance window required for remediation? No

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