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. It includes proactive connectivity monitoring, fault verification, and fault isolation for large Ethernet metropolitan-area networks (MANs) and WANs. Background InformationĮthernet CFM is an end-to-end per-service-instance Ethernet layer operation, administration, and management (OAM) protocol. If your network is live, ensure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration.

The information in this document was created from the devices in a specific lab environment. This document is not restricted to specific software and hardware versions. Prerequisites RequirementsĬisco recommends that you have knowledge of these topics:

This document does not explain hardware limitations or the supported interface for CFM to work. The basic concepts of CFM, CFM's building blocks, a configuration guide, show commands, and Wireshark analysis of CFM messages is provided. This document describes Connectivity Fault Management (CFM) technology, configuration, post-checks, and troubleshooting.

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