CORD: Central Office Re-architected as a Datacenter - ONOS - Wiki
CORD started as an ONOS use case, but has since been spun off into its own open source project.Central Office Re-architected as a Datacenter (CORD) - CORD - CORD Wiki
Software Building Blocks
the reference implementation supports services running in virtual machines (KVM), in containers running directly on bare metal (Docker), and in containers nested inside virtual machines (Docker in KVM).
- OpenStack  is the cluster management suite that provides the core IaaS capability, and is responsible for creating and provisioning virtual machines (VMs) and virtual networks (VNs).
- Docker  provides a container-based means to deploy and interconnect services. It also plays a key role in configuring and deploying CORD itself (e.g., the other elements—XOS, OpenStack, and ONOS—are instantiated in Docker containers on the POD head nodes.
- ONOS  is the network operating system that manages the underlying white-box switching fabric. It both hosts a collection of control applications that implement services on behalf of Telco subscribers and is responsible for embedding virtual networks in the underlying fabric, which is in turn accessed via OpenStack’s Neutron API.
- XOS  is a framework for assembling and composing services. It unifies infrastructure services (provided by OpenStack), control plane services (provided by ONOS), and any data plane or cloud services (running in OpenStack-provided virtual machines and Docker-provided containers).
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