Huawei’s CCVPN use case showed how ONAP could coordinate an enterprise VPN across both optical transport and SD-WAN layers—and across two operators, Vodafone and China Mobile. Presented in 2018, the demonstration used a separate ONAP instance at each operator, with the instances peering to provision a service across their network boundaries.
What are ONAP and CCVPN?
ONAP is the orchestration platform
The Open Network Automation Platform (ONAP) is an open-source, vendor-agnostic framework for designing, implementing, analyzing and managing network services over their lifecycle. It can coordinate physical and virtual network functions, rather than being limited to configuring one device or one network layer.
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In the CCVPN use case, ONAP supplies the orchestration framework: it coordinates service components and network controllers so that a requested service can be delivered across different technologies and administrative domains.
CCVPN spans domains and layers
CCVPN stands for Cross Domain and Cross Layer VPN. The ONAP blueprint pairs SOTN—super high-speed optical transport networking—with ONAP to unify resource and service scheduling. Its design brings together an optical transport network (OTN) underlay and an SD-WAN overlay, while extending service delivery across operator boundaries.
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How does the CCVPN architecture fit together?
The blueprint divides work among ONAP components and network controllers. Each component has a distinct role in turning an end-to-end service request into work across the participating networks.
- SO (Service Orchestrator): coordinates the end-to-end service across domains and components.
- SDN-C: handles network connectivity.
- VF-C: manages network-service and virtual network function (VNF) lifecycle functions.
- Network controllers: provide control of the underlying transport and SD-WAN networks. Huawei’s commercial OTN and SD-WAN controller integrations were used in the 2018 demonstration.
- East-west interface: lets separate ONAP instances coordinate across providers. The blueprint aligns this inter-instance communication with the MEF Interlude API.
These are complementary roles: ONAP coordinates the service, while the controllers act on their respective networks. The blueprint also calls for discovering and modeling physical network resources, which gives orchestration a representation of the infrastructure it must schedule.
How can ONAP automate a VPN across operators?
- Represent the resources and service: Discover and model physical network resources, then define the VPN service and the network components it needs.
- Coordinate the service end to end: SO coordinates the service flow, while SDN-C and VF-C handle connectivity and network-service or VNF lifecycle tasks within their roles.
- Provision each operator’s segment: Each operator’s ONAP instance coordinates the resources and controllers in its own domain.
- Peer across the boundary: The operators’ ONAP instances exchange the necessary service coordination over the east-west interface, enabling provisioning across domains rather than relying only on a manually coordinated handoff.
- Manage changes and operations: The blueprint identifies capabilities such as rerouting, branch or VNF changes and optimization as part of its broader automation vision.
This is a cross-operator orchestration model, not a claim that one ONAP instance takes control of every participating network. Each provider retains a local instance to coordinate its own domain, with inter-instance coordination used for the shared service.
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In this design, OTN provides the optical transport underlay, while SD-WAN provides an overlay for connecting enterprise sites. The service depends on both layers: the overlay supplies the SD-WAN connectivity, and the optical network supplies transport beneath it. Coordinating both allows the service orchestration to account for resources and changes at more than the IP or overlay layer.
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The CCVPN blueprint describes this as cross-layer scheduling. Its aim is to avoid treating the transport and overlay as unrelated provisioning tasks, while still using controllers suited to each network technology.
What did Huawei demonstrate with Vodafone and China Mobile?
Huawei, Vodafone and China Mobile presented the demonstration at Open Networking Summit Europe in Amsterdam on September 26, 2018. Vodafone and China Mobile each ran an ONAP instance. Each instance coordinated that operator’s OTN underlay and SD-WAN overlay, and the instances peered to deliver a VPN across the two operators’ networks.
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Huawei announced the demonstration as an ONAP Casablanca use case. At the time of its September 2018 announcement, Huawei said the Casablanca release was expected in November 2018; that was a contemporaneous schedule, not a statement about the current ONAP release. The Linux Foundation described CCVPN as code for automating cloud-enabled, software-defined VPN services across network-operator borders.
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The demonstration matters as an architecture example: it brought together two operators, two network layers and multiple controller integrations. It does not, by itself, establish present-day commercial availability, deployment scale or performance figures. The primary materials cited for this use case describe participants, design and features, but publish no material quantitative performance statistic for the demonstration.
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What capabilities were added in later ONAP documentation?
ONAP’s Jakarta documentation records later enhancements to the CCVPN-related work, extending beyond the 2018 demonstration:
- Intent-based service discovery for cloud leased-line and transport-slicing services.
- 1+1 protection for cloud leased-line services.
- Closed-loop and user-triggered intent updates, supporting service changes through automated operational responses or user requests.
These are later documented capabilities; they should not be read as features proven in the 2018 event demonstration. Taken together, the blueprint and subsequent documentation describe a progression from cross-domain provisioning toward service discovery, protection and intent-driven operations.
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