Updating a Logical Switch configuration to enable the use of guest VLANs is not currently supported.

Products

• VMware NSX Data Center for vSphere

Issue/Introduction

When updating an existing Logical Switch configuration to enable the use of guest VLANs  (Virtual Guest Tagging or 802.1q VLAN tagging) does not produce the expected result:

The portgroup associated to the Logical Switch is not updated accordingly





Symptoms:
Updating an existing Logical Switch configuration via API call or via the vCloud Director UI with the purpose to enable the use of guest VLANs (Virtual Guest Tagging or 802.1q VLAN tagging) does not produce any effect.

Environment

VMware NSX Data Center for vSphere 6.4.x

Cause

Updating an existing Logical Switch configuration to enable the "guestVlanAllowed" option is not currently implemented in NSX-V.

Resolution

Currently there is no resolution.

Workaround:
The option to enable the use of guest VLAN tagging works correctly when creating a new Logical Switch via API call enabling the "guestVlanAllowed" option as in the example below:

<virtualWireCreateSpec>
<name>Guest-VLAN-Tier</name>
<description>Guest VLAN tagging network</description>
<tenantId>virtual wire tenant</tenantId>
<controlPlaneMode>MULTICAST_MODE</controlPlaneMode>
<guestVlanAllowed>true</guestVlanAllowed>
</virtualWireCreateSpec>

Additional Information

Impact/Risks:
The virtual machines configured for Guest VLAN tagging (Virtual Guest Tagging or 802.1q VLAN tagging) attached to the Logical Switch will not have network connectivity.