
Chapter 4: Feature Description
Ethernet Features
If the service frame does not comply with the CIR defined in the bandwidth profile, but does
comply with the EIR and EBS, it is marked Yellow. In this case, the average service frame rate is
greater than the CIR but less than the EIR, and the maximum service frame size is less than the
EBS.
If the service frame fails to comply with both the CIR and the EIR defined in the bandwidth profile,
it is marked Red and discarded.
In the PTP 820S, bandwidth profiles are constructed using a full standardized TrTCM policer
mechanism.
Ethernet Services Definitions
The MEF provides a model for defining Ethernet services. The purpose of the MEF model is to help
subscribers better understand the variations among different types of Ethernet services. PTP 820S
supports varieties of service types defined by the MEF. All of these service types share some
common attributes, but there are also differences as explained below.
Ethernet service types are generic constructs used to create a broad range of services. Each
Ethernet service type has a set of Ethernet service attributes that define the characteristics of the
service. These Ethernet service attributes in turn are associated with a set of parameters that
provide various options for the various service attributes.
Figure 23 MEF Ethernet Services Definition Framework
The MEF defines three generic Ethernet service type constructs, including their associated service
attributes and parameters:
•
Ethernet Line (E-Line)
•
Ethernet LAN (E-LAN)
•
Ethernet Tree (E-Tree)
Multiple Ethernet services are defined for each of the three generic Ethernet service types. These
services are differentiated by the method for service identification used at the UNIs. Services using
All-to-One Bundling UNIs (port-based) are referred to as “Private” services, while services using
Service Multiplexed (VLAN-based) UNIs are referred to as “Virtual Private” services. This
relationship is shown in the following table.
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Содержание PTP 820S
Страница 1: ...Cambium PTP 820S Technical Description System Release 7 9 ...
Страница 27: ...Chapter 2 PTP 820S Hardware Description PoE Injector Figure 7 PoE Injector Ports Page 2 8 ...
Страница 156: ...Chapter 6 Standards and Certifications This chapter includes Supported Ethernet Standards Page 6 1 ...
Страница 208: ...Term Definition XPIC Cross Polarization Interference Cancellation Page IV ...