Change VXLAN port from 8472 to 4789

Products

• VMware NSX Data Center for vSphere

Issue/Introduction

In NSX for vSphere 6.2.3 or later, the default VXLAN UDP port is 4789. This port is the standard port that is assigned by IANA. In earlier versions of NSX for vSphere, the default VXLAN UDP port number was 8472. After you upgrade NSX for vSphere, you must change the VXLAN port to enable the communication with NSX components that are based on a version 6.2.3 or later. 

Environment

VMware NSX Datacenter for vSphere 6.x

Cause

The requirement is to align VXLAN encapsulation with the IANA-assigned UDP port 4789. This change is typically driven by standardization efforts, compliance requirements, or to ensure interoperability with other network devices that expect the IANA-standard VXLAN port.

Resolution

• Log in to the Management vCenter Server by using the vSphere Web Client.
• In the Navigator, click Networking & Security, and click Installation.
• Click the Logical Network Preparation tab and click VXLAN Transport.
• Click the Change button next to VXLAN Port and enter 4789.

Additional Information

Process to change VXLAN port from 8472 to 4789 may fail or never complete

Changing VXLAN UDP port from 8472 to 4789 fails on NSX