Service Delivery Technologies for Metro Ethernet Networks
Source: Nortel Networks
Ethernet had its origins in providing network connectivity for a single organization. With the introduction of metropolitan and wide area Ethernet services, providers started using this Ethernet "Connectivity" technology to provide Ethernet "Services." While the standard IEEE 802.3 Ethernet LAN protocol is still used, service delivery technologies needed to be added in order to create an Ethernet service. Three service delivery technologies can be used to provide Ethernet services - namely, IEEE 802.1Q Virtual LANs (VLANs), Q-in-Q (stacked VLANs) and MAC-in-MAC (or M-in-M). This paper describes the capabilities and usage of each technology. This paper, intended for service provider network architects and technologists, provides a holistic view of different Ethernet technologies used for service delivery over Ethernet networks.