This seemingly complicated approach is also illustrated in Figure 2.6, but it will become
clearer when real-life examples are discussed later in the chapter. It is helpful to
remember that every service is defined in terms of a service type and invariably has a
set of UNI and EVC attributes13 that will uniquely define it.
Before delving into the specific service types (which are defined in terms of the
Ethernet service attributes), it is useful to understand these service attributes.
13 Collectively referred to as the set of Ethernet service attributes.
Figure 2.6 Defining Ethernet services
MEF Ethernet Service Definition Framework
Carrier
Ethernet
Service
Defined
by
Defined
by Defined
by
??? E-Line
??? E-LAN
??? E-Tree*
* Not ratified yet
??? Ethernet Physical Interface
??? Traffic Parameters
??? Performance Parameters
??? Class of Service
??? Service Frame Delivery
??? VLAN Tag Support
??? Service Multiplexing
??? Bundling
??? Security Filters
UNI & EVC Attributes Associated
with the Service Type
Actual Values for
Each of the UNI/EVC
Attributes
Ethernet
Service
Type Ethernet
Service
Attribute
Ethernet
Service
Attribute
Parameters
Carrier Ethernet
Services?†’
Defining Carrier Ethernet Services
62 Chapter 2
Ethernet Service Attributes
The Ethernet service attributes are categorized into the following groups: Ethernet
Physical interface, Traffic parameters, Performance parameters, Class of Service,
Service frame delivery, VLAN tag support, Service Multiplexing, Bundling, and Security
filters.
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