Issue when trying to add the IPv4 network to a vAPP in a dual stacked enabled OrgVdc in VMware Cloud Director UI

Products

• VMware Cloud Director

Issue/Introduction

• There is an issue with VMware Cloud Director (VCD) where Virtual Machines (VMs) will not get proper IP configuration from VCD (via "Static-IP Pool") when they are part of a Virtual Application(vAPP) and a dual-stack network is attached to them.
• The network with IPv6 dual stack is enabled and when you try to add this network as direct network to vApp, sometimes this network adds in an incorrect state with only IPv6 and no IPv4 networks. 

Environment

VMware Cloud Director 10.5.1 

Resolution

There is no current resolution at the moment, but you can try the workaround to resolve the issue temporarily. To workaround the issue is you can assign the ipv4 and ipv6 address manually instead of the ip pool.

For the workaround follow the below steps.

1. For the selected vAPP having the network issue, click Details. 
2. After loading the details, on the Networks tab, click the network to view the network details.
3. Now on the IP Management tab, click Static Pools.
4. Click Edit.
5. Enter an IP range for both IPv4 and IPv6 and click Add.
6. Click Save to save both the IP ranges.