Specifications

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Cisco MWR 2941 Mobile Wireless Edge Router Software Configuration Guide, Release 12.2(33)MRB

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Chapter 4 Configuring the Cisco MWR 2941 Router Using the CLI

Configuration Sequence

Configuring Ethernet Connectivity Fault Management (CFM)

Ethernet Connectivity Fault Management (CFM) is an end-to-end per-service-instance Ethernet layer

operations, administration, and maintenance (OAM) protocol. It includes proactive connectivity

monitoring, fault verification, and fault isolation for large Ethernet metropolitan-area networks (MANs)

and WANs. Ethernet CFM provides a competitive advantage to service providers in managing link

uptime and isolating and responding to network failures.

The following sections describe how to set up Ethernet CFM on the Cisco MWR 2941:

• Understanding Ethernet CFM

• Configuring Ethernet CFM

Understanding Ethernet CFM

Before you set up Ethernet CFM, you should understand the following concepts:

• Customer Service Instance, page 4-21

• Maintenance Domain, page 4-22

• Maintenance Point, page 4-24

• CFM Messages, page 4-26

• Cross-Check Function, page 4-27

• SNMP Traps, page 4-28

• Ethernet CFM and Ethernet OAM Interaction, page 4-28

• NSF/SSO Support in CFM 802.1ag/1.0d, page 4-29

• ISSU Support in CFM 802.1ag/1.0d, page 4-29

Note For additional information about Ethernet CFM, see the Cisco IOS Carrier Ethernet Configuration

Guide, Release 12.2SR.

Customer Service Instance

A customer service instance is an Ethernet virtual connection (EVC), which is identified by an S-VLAN

within an Ethernet island and a globally unique service ID. A customer service instance can be

point-to-point or multipoint-to-multipoint. Figure 4-1 shows two customer service instances. Service

Instance Green is point to point; Service Instance Blue is multipoint to multipoint.