CHAPTER 8
Configuring Ethernet Connectivity Fault
Management in a Service Provider Network
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.
The advent of Ethernet as a MAN and WAN technology imposes a new set of OAM requirements on Ethernet’s
traditional operations, which were centered on enterprise networks only. The expansion of Ethernet technology
into the domain of service providers, where networks are substantially larger and more complex than enterprise
networks and the user base is wider, makes operational management of link uptime crucial. More importantly,
the timeliness in isolating and responding to a failure becomes mandatory for normal day-to-day operations,
and OAM translates directly to the competitiveness of the service provider.
As an alternative, CFM can be configured over an Ethernet flow point (EFP) interface by using the cross
connect functionality. For more information about this alternative, see Configuring the CFM over EFP
Interface with Cross Connect Feature.
Note
•
Finding Feature Information, page 124
•
Prerequisites for Configuring Ethernet CFM in a Service Provider Network, page 124
•
Restrictions for Configuring Ethernet CFM in a Service Provider Network, page 124
•
Information About Configuring Ethernet CFM in a Service Provider Network, page 125
•
How to Set Up Ethernet CFM in a Service Provider Network, page 134
•
Configuration Examples for Configuring Ethernet CFM in a Service Provider Network, page 205
•
Additional References, page 210
•
Feature Information for Configuring Ethernet CFM in a Service Provider Network, page 211
•
Glossary, page 211
Carrier Ethernet Configuration Guide (Cisco ASR 920 Series)
123
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