Overview:
The Metro Ethernet Forum (MEF) is an industry organization dedicated to
furthering the deployment of carrier Ethernet services. Ethernet began
life as a LAN then expanded to the MAN and is now truly a WAN with
many carriers offering services that span the globe. The MEF specifies the
Ethernet user network interface (E-UNI) and the network services (E-Line, E-LAN and E-Tree).
The E-UNI is the service demarc and is defined to be a standard
Ethernet interface. The access technology and core network technology is not
defined by the MEF, allowing the carrier to select the right technology
for its network. Service attributes are defined for each service, so carrier
offerings can be compared even though different technology may be used to
implement the service.
Carrier Ethernet is a marketing term for extensions to Ethernet to
enable telecommunications network providers ("common carriers"
in US
Network Implementations:
|
Access
|
Aggregation
|
Core
|
|
Ethernet
LAN
|
Metro Ethernet
|
Carrier
Ethernet
|
Carrier
Ethernet is equipment that leverages the heritage of Ethernet while extending
it with features that make Ethernet useful in mission-critical transport
networks. These extensions, predominantly covered in the IEEE 802.1a set
of standards, include enhanced scalability and OAM capabilities. Carrier
Ethernet supports features needed in a transport network such as connectivity
verification, rapid recovery, and performance measurement.
The key features and benefits of Carrier Ethernet include:
The key features and benefits of Carrier Ethernet include:
- Well Known Technology – Carrier Ethernet
leverages and extends all the features, including low cost, of traditional
Ethernet
- LAN Services in the WAN – emulates popular LAN
and point-to-point Ethernet services
- Scalability – scales to 1000s of
endpoints
- Convergence – a common platform for
IP-based voice, data and video services
There’s no
doubt that Ethernet is the service interface of the future. The native protocol
for all new devices is moving toward Ethernet – voice, video and data. Until
now, the only challenge in deploying a pure Ethernet infrastructure was quality
of service.
Carrier
Ethernet has finally met that challenge. It offers a great user experience
for triple play services, promises new service revenues with user bandwidth
profiles and provides carrier class reliability.
On top of
that Carrier Ethernet is simple and inexpensive, making it a perfect platform
for delivering the triple play.
- Networks must support carrier
class QoS
- Carrier Ethernet has the
ability to prioritize data, voice and video to provide a superior user
experience, flexible mapping service queues
- Carrier Ethernet can segregate
users and provide bandwidth profiles, multistage hierarchical
scheduling/shaping
- Carrier Ethernet provides 50
msec resiliency
- Network must provide
circuit-based visibility
- Carrier Ethernet allows
per-circuit performance monitoring
- Carrier Ethernet provides Service
Based OAM
- Networks must be flexible
- Carrier Ethernet offers MPLS
- Carrier Ethernet allows topology
independent
- Carrier Ethernet allows technology
and protocol independent
Services:
E-Line –
Ethernet Line. A service connecting two customer Ethernet ports over a WAN.
E-LAN –
Ethernet LAN. A multipoint service connecting a set of customer endpoints,
giving the appearance to the customer of a bridged Ethernet network connecting
the sites.
E-Tree –
Ethernet Tree. A multipoint service connecting one or more roots and a set of
leaves, but preventing inter-leaf communication.
Deployment:
Mobile
Backhaul, Triple-Play Backhaul, High-Performance
Data Center
Future Reading
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