34 Enabling the Digital and Energy transition CORD brings data center economics and cloud agility to the Telco central office by combining Network Function Virtualization (NFV) and Software Defined Networking (SDN). The open model for CORD uses commodity servers, white box switches, and open source software to deliver an extensible platform that supports a variety of application domains (e.g., enterprise, residential, and mobile), based on a common infrastructure. The following projects build the network infrastructure and services with CORD principles, allowing capex and open saving for service provider, while at the same time offering more services and future proofing their network deployments. Trellis — A leading open-source multi-purpose leaf-spine fabric supporting distributed access networks, NFV and edge cloud applications. TrellisTM acts as the foundation of the CO deployment and is built using bare-metal switches with merchant-silicon ASICs. Trellis is currently deployed in production networks by a Tier-1 US network operator. Trellis provides classic-SDN Control with ONOS to achieve L2 forwarding (Bridging) within server-racks and L3 forwarding (Routing) across racks, MPLS Segment routing for better scale and reduced programming and control plane functionality with Trellis vRouter for external connectivity. High Availability and N-way redundancy is also provided. SEBA — SEBATM is a lightweight platform for broadband access that supports a multitude of virtualized access technologies at the edge of the carrier network, including PON, G.Fast, and eventually DOCSIS and more. SEBA supports both residential access and wireless backhaul and is optimized such that traffic can run ‘fastpath’ straight through to the backbone without requiring VNF processing on a server. SEBA is comprised of VOLTHA, ONOS with Trellis and NEM (Network edge Mediator). VOLTHA, Virtual OLT Hardware Abstraction, currently provides a common, vendor agnostic, PON control and management system, for a set of white-box and vendorspecific PON hardware devices. On its northbound interface, VOLTHA abstracts the PON network to appear as a programmable Ethernet switch to an SDN controller. Major operators such as DT and Turk Telekom have SEBA and VOLTHA in production, others such as NTT, TIM, Telefonica and AT&T are at different stages of trials. AETHER — Aether is the first open source Enterprise 5G/LTE Connected Edge Cloud platform. Aether provides cloud managed mobile connectivity and edge cloud services for distributed enterprise networks. Aether is optimized for multi-cloud deployments, and simultaneously supports wireless devices over licensed and unlicensed (CBRS) spectrum. Aether is delivered on top of commodity hardware and enables enhanced performance 5G mobile edge computing experience with networks and services supporting a disaggregated/ virtualized evolved packet core (EPC) and a programmable radio access network. A micr-service based SD-RAN deployment is included. Aether opens up the 5G edge to cost savings with better programmability, new services and deployment agility, while introducing visibility and verification. CORD based Infrastructure and Projects The open model for CORD uses commodity servers, white box switches, and open source software to deliver an extensible platform that supports a variety of application domains, based on a common infrastructure.
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