Chapter 6: Carrier Ethernet Architectures and Services
Ethernet is becoming a dominant technology in enterprise networks, allowing bandwidth partitioning, user segregation, and traffic prioritization, introduced by IEEE 802.1P and 1Q. In 1998, IEEE 802.1d combined VLAN and prioritization capabilities and introduced another service provider tag to scale the addressing structure. These capabilities formed the base for Carrier Ethernet. The Carrier Ethernet equipment business is estimated to be $30.7 billion in 2012  by Vertical Systems.
In 2001, the MEF was formed to define Ethernet-based services. MEF defined Carrier Ethernet for business users as a ubiquitous, standardized, carrier-class Service and Network defined by five attributes (Standardized Services, QoS, Service Management, Reliability, Scalability) that distinguish it from familiar LAN-based Ethernet . Similarly, it is defined for service providers as
Ethernet has been used as a LAN connectivity technology in Enterprise. With the introduction of Carrier Ethernet, Ethernet is being used as a service. It is an easy to use, widely available, and well-understood technology. Ethernet simplifies OAM&P (operations, administration, maintenance, and provisioning) and ...