VXLAN configuration in VMware NSX for vSphere 6.x fails with the error: Configure VXLAN networking VLAN xxx cannot be used. Other VLAN IDs are in use on the specified VDS
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VXLAN configuration in VMware NSX for vSphere 6.x fails with the error: Configure VXLAN networking VLAN xxx cannot be used. Other VLAN IDs are in use on the specified VDS

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Article ID: 339057

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Updated On:

Products

VMware NSX Networking

Issue/Introduction

Symptoms:
  • VXLAN configuration in VMware NSX for vSphere 6.x fails
  • VXLAN configuration in VMware NSX for vSphere 6.x does not complete.
  • In the vSphere Web Client UI, you see an error similar to:

    Configure VXLAN networking VLAN xxx cannot be used. Other VLAN IDs are in use on the specified VDS.


Environment

VMware NSX for vSphere 6.1.x
VMware NSX for vSphere 6.0.x

Cause

This issue occurs because NSX for vSphere 6.x only supports a single VXLAN VLAN per vSphere Distributed Switch (vDS). Secondary VLANs are not supported.

Resolution

Note: The VXLAN network is used for Layer 2 Logical Switching across ESXi hosts.

To resolve this issue:
  1. Log in to the vCenter Server using the vSphere Web Client.
  2. In Home > Networking & Security, ensure that you are on Installation > Host Preparation tab.
  3. In the Configuring VXLAN networking dialog box, select the switch to which you want to map the cluster. Then type the VLAN transport.
For more information, see the Configure VXLAN Transport Parameters section in the NSX Installation and Upgrade Guide.


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