Carrier Ethernet
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| Carrier Ethernet | |
|---|---|
| Name | Carrier Ethernet |
| Type | Metropolitan and wide area networking technology |
| Developer | Metro Ethernet Forum; IEEE; ITU-T |
| Introduced | 2000s |
| Related | Ethernet; MPLS; SDN; NFV |
Carrier Ethernet is a class of networking technologies and services that apply Ethernet protocol principles to metropolitan, regional, and wide area telecommunications networks operated by service providers such as AT&T, BT Group, Verizon Communications, Deutsche Telekom, and Orange S.A.. It evolved from enterprise Ethernet and circuit technologies to enable scalable, managed connectivity for enterprises, data centers, and content delivery networks operated by companies like Equinix, Cogent Communications, Akamai Technologies, and NTT Communications.
History and evolution
Carrier Ethernet traces roots to the commercialization of Ethernet standards driven by the Institute of Electrical and Electronics Engineers (IEEE) and early carrier data services provided by companies including British Telecom and Sprint Corporation. The formation of the Metro Ethernet Forum (MEF) accelerated standardized service definitions and inter-carrier interoperability alongside parallel work by International Telecommunication Union (ITU-T) study groups and the European Telecommunications Standards Institute (ETSI). Key milestones include adoption of IEEE 802.3 extensions, integration with Multiprotocol Label Switching (MPLS) pioneered by Cisco Systems and Juniper Networks, and the shift toward software-centric control with initiatives involving Open Networking Foundation and Linux Foundation projects. Market drivers included growth of content platforms such as Netflix, expansion of cloud providers like Amazon Web Services, Microsoft Azure, and Google Cloud Platform, and regulatory environments influenced by entities like the Federal Communications Commission and the European Commission.
Architecture and technologies
Carrier Ethernet architecture blends physical layer fabrics and layered control planes. Physical media include fiber optics deployed by operators like Crown Castle and Zayo Group, while packet transport uses standards from IEEE 802.3 and encapsulation from IEEE 802.1Q and IEEE 802.1ad (Q-in-Q). Transport and traffic engineering commonly employ MPLS-TP, Segment Routing developed in the IETF, and pseudowire technologies standardized by IETF working groups. Virtualization and programmability are enabled through Software-defined Networking initiatives led by OpenDaylight and ONOS, with orchestration via ETSI NFV frameworks integrating VNFs from vendors like Huawei Technologies and Ericsson. Support elements include Dense Wavelength Division Multiplexing suppliers such as Ciena and Infinera, timing and synchronization from systems using Precision Time Protocol standardized by IEEE 1588, and operations support from platforms developed by Amdocs and Netcracker Technology.
Services and service attributes
Carrier Ethernet services comprise Ethernet Private Line (EPL), Ethernet Virtual Private Line (EVPL), Ethernet LAN (E-LAN), and Ethernet Tree (E-Tree) offerings defined by the Metro Ethernet Forum. Key attributes include bandwidth profiles, committed information rate and excess information rate, class of service mapping for latency-sensitive traffic (important for customers like Goldman Sachs and Morgan Stanley), and service-level agreements (SLAs) influenced by performance metrics used by companies such as Accenture and Deloitte. Interconnect services among carriers, enterprise WAN connectivity for multinationals like Siemens and Toyota Motor Corporation, and cloud onramps to hyperscalers are typical. Wholesale Ethernet markets involve resellers and carriers including Telefonica and T-Mobile US.
Standards and certification
Standards bodies that shape Carrier Ethernet include IEEE, MEF, IETF, and ITU-T. MEF specifications such as MEF 10, MEF 20, MEF 30, and later lifecycle-driven standards define service types, OAM, and service orchestration. IEEE projects extend physical and link-layer behaviors via standards like IEEE 802.1Qay and IEEE 802.3ah, while IETF RFCs address MPLS and pseudowire operational models. Certification programs from the MEF validate equipment and service conformance for vendors including Huawei, Cisco Systems, Nokia, and Juniper Networks. National regulatory regimes touching interconnect and wholesale terms include agencies such as the Ofcom and the Bundesnetzagentur which influence rollout and competition.
Deployment and use cases
Major deployments occur in metropolitan aggregation rings, regional backbones, and intercontinental backbone links operated by carriers like Level 3 Communications (now part of CenturyLink/Lumen Technologies), Tata Communications, and Sprint. Use cases include enterprise WAN replacement for corporations such as Unilever and Procter & Gamble, mobile backhaul for operators including Vodafone and T-Mobile, data center interconnect for providers like Digital Realty and Equinix, and media distribution for broadcasters such as BBC and CNN. Emerging deployments support 5G transport, edge computing initiatives with partners like NVIDIA and ARM Holdings, and IoT connectivity platforms developed by Cisco and Hitachi.
Performance, management, and assurance
Performance objectives—latency, jitter, packet loss, and availability—are measured using OAM and performance monitoring tools standardized by MEF and ITU-T such as Connectivity Fault Management and Performance Monitoring (IEEE/MEF OAM equivalents). Management frameworks integrate element management from vendors like Huawei, service orchestration via ONAP (driven by the Linux Foundation), and telemetry platforms using gRPC and OpenConfig models advocated by IETF and operators like CenturyLink/Lumen Technologies. Service assurance uses analytics and AIOps from firms such as Splunk and Dynatrace to correlate faults and SLA violations; security controls include MAC security and integration with network slicing concepts promoted by 3GPP for 5G. Scalability and resiliency techniques build upon ring protection, link aggregation, and fast reroute mechanisms designed by IETF and implemented by carriers worldwide.