Cisco SD-WAN Cloud OnRamp for Colocation solution is a flexible architecture that securely connects to enterprise applications that are hosted in the enterprise data center, public cloud, private or hybrid cloud to an enterprise’s endpoints such as, employees, devices, customers, or partners. This functionality is achieved by using Cloud Services Platform 5000 series(CSP 5444) as the base Network Function Virtualization (NFV) platform that securely connects enterprise's endpoints to applications. By deploying Cisco SD-WAN Cloud OnRamp for Colocation solution in colocation centers, customers can virtualize network services and other applications, and consolidate them into a single platform.

The components of Cisco SD-WAN Cloud OnRamp for Colocation solution are :

• Cisco Cloud Services Platform (CSP) 5444—CSP is an x86 Linux hardware platform that runs NFVIS software. It is used as the compute platform for hosting the virtual network functions in the Cisco SD-WAN Cloud OnRamp for Colocation solution.The whole solution can scale horizontally. You can have up to eight CSP devices. Depending on the load requirement, you can have anywhere from two to eight compute platforms in a cluster.

• Cisco Network Function Virtualization Infrastructure Software (NFVIS)—The Cisco NFVIS software is used as the base virtualization infrastructure software running on the x86 compute platform.

• Virtual Network Functions (VNFs)—The Cisco SD-WAN Cloud OnRamp for Colocationb solution supports both Cisco-developed and third-party virtual network functions.

• Physical Network Functions—A Physical Network Function (PNF) is a physical device that is dedicated to provide a specific network function as part of a colocation service chain such as router, firewall.

• Network Fabric—Forwards traffic between the VNFs in a service chain by using a L2 and VLAN-based lookup.

• Mangament Network—A separate management network connects the NFVIS software running on the CSP systems, the virtual network functions, and the switches in the fabric. This management network is also used for transferring files and images into and out of the systems. The Out of Band (OOB) management switch configures the management network.

• VNF Network Connectivity—A VNF can be connected to the physical network by using either Single Root IO Virtualization (SR-IOV) or through a software virtual switch. A VNF can have one or more virtual network interfaces (vNICs), which can be directly or indirectly connected to the physical network interfaces. A physical network interface can be connected to a software virtual switch and one or more VNFs can share the virtual switch. The Cisco SD-WAN Cloud OnRamp for Colocation solution manages the creation of virtual switch instances and the virtual NIC membership to create connectivity.

• Physical Network Function Network Connectivity—A PNF can be connected to the Catlyst 9500 switches port, which are kept free towards backend.

• Service Chains—In Cisco SD-WAN Cloud OnRamp for Colocation solution deployment, the traffic between the VNFs (with SR-IOV) running on the CSP 5444 systems is service chained externally through Catalyst 9500.

• Cisco Colo Manager (CCM)—This component is a software stack that manages a colocation. In this solution, CCM is hosted on NFVIS software in a docker container. A single CCM instance per cluster is brought up in one of the CSPs after activating a cluster.

• Orchestration through vManage—The Cisco vManage is used for orchestrating the Cisco SD-WAN Cloud OnRamp for Colocation solution.

Essentially, you can purchase the devices, add them in colocation centers, power them, cable them and devices automatically boot up, bootstrap themselves and get managed by vManage. You can go ahead with designing service chains, building security policies and application policies, thereby influencing the network traffic.