You can extend L2 networks from your SDDC to VMware Cloud on Dell EMC SDDC using the NSX L2 VPN feature.
By extending the L2 network, you can migrate VMs to and from your VMware Cloud on Dell EMC SDDC without changing their IP addresses. Also, you can use an extended L2VPN network for a disaster recovery. For more information on setting up L2VPN, see the Configure a Layer 2 VPN and Extended Network in the VMware Cloud on AWS Networking and Security guide. However, you must log in to VMware Cloud Services Console at https://console.cloud.vmware.com/csp/gateway/discovery and not https://vmc.vmware.com as mentioned in the AWS documentation.