The Telco Cloud can be deployed as a greenfield deployment or as an extension to an existing brownfield deployment.
Greenfield Deployment
Depending on the requirements, greenfield deployments can include components of the Telco Cloud Infrastructure Tier and the Telco Cloud Platform Tier. The combination of these two tiers allows for the deployment of 4G, 5G Core, or RAN environments and legacy telco applications.
VNFs only: For greenfield deployments where the required outcome is to deploy VNFs (VM-based workloads), the Infrastructure tier is recommended. In the infrastructure tier the Virtual Infrastructure Manager (VIM) can be used to manage tenancy and VNF workloads.
With Telco Cloud Platform Essentials, use cases such as control-plane workloads and OSS/BSS platforms can be deployed and managed using Telco Cloud Automation.
With Telco Cloud Platform Advanced, NSX functions as the Software-Defined Networking stack for the infrastructure platform. VMware Advanced Load Balancer (formerly Avi Networks) can be used to provide L4 load balancing and can also be integrated with the VIM for tenant control
CNFs only: For greenfield deployments that focus only on Cloud-Native Network Functions (CNFs) deployed on Kubernetes , the Platform tier with Telco Cloud Platform Advanced is recommended. The Compute and Storage tiers are provided through the Hypervisor and the Software Defined Storage capabilities in the Infrastructure tier. In addition, the software defined networking platform is used for 5G Core deployments. Depending on the CNF requirements, an advanced load-balancer can be used to provide L4 load balancing and L7 ingress functionalities.
VNFs and CNFs: For mixed-mode deployments, a combination of Infrastructure and Platform tiers is recommended. Telco Cloud Automation in the Platform tier can be used to onboard, instantiate, and life cycle management (LCM) not only CNFs but also VNFs deployed to one of the Infrastructure endpoints. Depending on the design goals, simple workloads can leverage Telco Cloud Platform Essentials while more complex workloads can leverage Telco Cloud Platform Advanced.
Telco Cloud Platform Advanced includes a software defined networking stack and as an add-on a Load Balancer for additional networking functionalities. For CNFs, the traditional VIM component is not used. Resource isolation and multi-tenancy differences must also be considered for VNFs and CNFs.
Typically, resource isolation occurs at the hypervisor cluster level. However, for complex architectures that incorporate Core and RAN, separate Virtual Infrastructures can also be leveraged to better handle independent LCM cadences.
RAN-specific CNFs only: For RAN-only deployments that are focused on the DU and CU network functions, the Platform tier is recommended. Some components notably Software Defined Storage and Software Defined Networking are not included in this deployment model. Due to the architecture of RAN-only environments, these components are not commonly used. The Telco Cloud Platform RAN bundle uses fewer components from both the Infrastructure and Platform tiers, although a common set of management and operational components exists in all deployment models.
In addition, the platform can support various security elements through add-ons. Security elements include Microsegmentation (through Distributed Firewalling capabilities), Advanced Threat Protection (ATP), and Intrusion Detection and Prevention (IDP) services.
For more information about the design specifics for 5G Core, RAN, and legacy environments, see Telco Cloud Architectures.
Brownfield Deployments
After deploying a Telco Cloud as part of vCloud NFV, Telco Cloud Infrastructure, or cloud-native Telco Cloud Platform, additional components from the portfolio can be leveraged to extend or enhance the existing Telco Cloud environment.
Existing vCloud NFV Base: To upgrade an existing vCloud NFV environment to the Telco Cloud Platform (Advanced), the Infrastructure Components must be upgraded. Depending on the design requirements, additional components such as the Load Balancer can be leveraged.
The existing vCloud NFV deployment can also be upgraded and evolved to incorporate the Telco Cloud Platform tier, enabling new cloud-native network functions and services through Telco Cloud Automation and Kubernetes.
Adding Capabilities to an Existing Telco Cloud Infrastructure Deployment: According to the design requirements, an existing Telco Cloud Infrastructure deployment can be enhanced to support cloud-native network functions. This might require upgrades to one or more of the Infrastructure components to ensure compatibility between the components of the Telco Cloud Platform tier and the Telco Cloud Infrastructure tier.
When expanding the scope of an existing environment, mixed-mode environments are supported. This allows upgraded Virtual Infrastructure to be used for both deployments on the new hypervisor clusters while co-existing with the existing environment on the original versions.
