The Carrier Ethernet Model; Ethernet Flow Point; Prerequisites For Layer 2 Tunnel Protocol Version - Cisco CRS Configuration Manual

The Carrier Ethernet Model

This module provides the conceptual information for Implementing Ethernet Flow Points (EFPs).
Table 1: Feature History for Implementing Ethernet Flow Point
Release
Release 5.1.1
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Ethernet Flow Point

An Ethernet Flow Point (EFP) is a Layer 2 logical subinterface used to classify traffic under a physical or a
bundle interface. A physical interface can be an Ethernet interface and has ports on the line card.
A bundle interface is a virtual interface, created by grouping physical interfaces together. For example, physical
interfaces such as 10 Gigabit Ethernet 0/0/0/1 and 10 Gigabit Ethernet 0/0/0/0 can be configured as members
of a bundle interface.
Grouping physical interfaces together can:
• Reduce the routing entries.
• Increase the bandwidth of the bundle interface.
• Balance the traffic on the bundle members.
EFP has the following characteristics:
• An EFP represents a logical demarcation point of an Ethernet Virtual Connection (EVC) on an interface.
• An EFP can be regarded as an instantiation of a particular service. An EFP is defined by a set of filters.
Modification
The EFP model was introduced on the Cisco CRS Router
Ethernet Flow Point, page 3
EFP CLI Overview, page 4
For an EVC associating two or more UNIs, there is a flow point on each interface of every device,
through which that EVC passes.
These filters are applied to all the ingress traffic to classify the frames that belong to a particular EFP.
An EFP filter is a set of entries, where each entry looks similar to the start of a packet (ignoring
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
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C H A P T E R
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