Ethernet Essay

4) Quality of Service- This attribute can specify bandwidth and end to end performance requirements. It uses SLAs that deliver end-to-end performance matching the requirements for voice, video and data over converged business and residential networks. This gives wide choice and freedom of bandwidth and QoS options.

5) Service Management- This gives ability to monitor, diagnose and centrally manage the network, using standard based vendor independent implementations. We can get rapid service provisioning with this attribute. It can also be seen as carrier class OAM.

VIII. CARRIER ETHERNET SERVICE TYPES

Carrier Ethernet comprises of following types of services:

1) General Service Type- These service type gives connectivity services or access based services and applications enabled over Ethernet. Fig 4 shows portfolio of Ethernet services provided by AboveNet communications. We can see they provide access based services for internet access, VOIP, storage extension and so on.

Fig.4- AboveNet Ethernet Service portfolio (Source: Heavy Reading)

2) Specific Service Type- Fig 5 shows exact representation of specific service types.

Fig-5 MEF Ethernet service types port based and VLAN based service definition (source: white paper on MEF carrier Ethernet on delivery of private cloud services on MEF.org[12])

MEF has categorized Ethernet based services on the type of connectivity they provide.

• E-Line for point-to-point connectivity

• E-LAN for multipoint-to-multipoint connectivity

• E-Tree for rooted-multipoint connectivity

The EVC is the logical representation of an Ethernet service instance. The EVC may also support one or more classes of service and measurable Quality of Service performance metrics, such as frame de...

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...mon schemes above will be LR4, SR4, and SR10.

The single-mode fiber cable options of 40GBASE-LR AND 100GBASE-LR4, two fibers are required to set up a transmit and receive full-duplex link. Within each fiber, four lasers will be combined to transmit signals in one direction using wavelength division multiplexing (WDM). In the 40 Gb /s case, each “lane” will transmit 10 Gb/s and 25 Gb/s for 100 Gb/s. The following diagram illustrates this method:

Fig.5

In looking at the multimode options of 40GBASE-SR4 and 100GBASE-SR10, we will need multiple fibers for transmit and receive signals each capable of 10 Gb/s transmission. For 40GBASE-SR4, there will be four fibers in each direction for a total of 8 fibers, each transmitting at 10 Gb/s. For 100GBASE-SR10, there will be 10 fibers in each direction for a total of 20 fibers, each transmitting at 10 Gb/s.