Cisco ASR 903 Guide

Layer 2 Solution
G.8032 ▀
Cisco ASR 903 Router Design and Deployment Guide▄
OL-30526-01
21
Maximum address limit: 256000
GigabitEthernet0/1/0 service instance 11
Port-channel1 service instance 2
Nile Mac Address Entries
BD mac addr type ports
----------------------------------------------------------------------------------
40 c8f9.f98d.103f DYNAMIC Po0/0/1.tefp2
40 c8f9.f98d.503f DYNAMIC Gi0/1/0.Efp11
G.8032
The G.8032 Ethernet Ring Protection Switching implements protection switching mechanisms for Ethernet layer
ring topologies. This feature uses the G.8032 Ethernet Ring Protection (ERP) protocol, defined in ITU-T G.8032,
to provide protection for Ethernet traffic in a ring topology, while ensuring that no loops are within the ring at the
Ethernet layer. The loops are prevented by blocking traffic on either a predetermined link or a failed link.
Figure 5. G.8032
ASR903-R1
(port 0)
Gi 0/2/1
Gi 0/2/0
(port 1)
Gi 0/2/0
(port 0)
Gi 0/2/1
(port 1)
Gi 0/2/1
(port 0)
Gi 0/2/0
(port 1)
Gi 0/2/0
(port 0)
(port 1)
Gi 0/2/1
ASR903-R2
ASR903-R4
ASR903-R3
For G.8032, CFM can be configured under either an EFP or main Ethernet interface for failure detection.
Following is a configuration example for CFM under EFP scenario.

Cisco ASR 903 Specifications

General

Brand	Cisco
Model	ASR 903
Category	Network Router
Language	English