Cisco Cisco IOS Software Release 12.2(33)SRE
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Ethernet Connectivity Fault Management
First Published: June 19, 2006
Last Updated: February 18, 2009
Last Updated: February 18, 2009
Ethernet Connectivity Fault Management (CFM) is an end-to-end per-service-instance Ethernet layer
operation, administration, and management (OAM) protocol. It includes proactive connectivity
monitoring, fault verification, and fault isolation for large Ethernet metropolitan-area networks (MANs)
and WANs.
operation, administration, and management (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.
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.
Finding Feature Information in This Module
Your Cisco IOS software release may not support all of the features documented in this module. To reach
links to specific feature documentation in this module and to see a list of the releases in which each feature is
supported, use the
links to specific feature documentation in this module and to see a list of the releases in which each feature is
supported, use the
.
Finding Support Information for Platforms and Cisco IOS and Catalyst OS Software Images
Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS
software image support. To access Cisco Feature Navigator, go to
software image support. To access Cisco Feature Navigator, go to
. An
account on Cisco.com is not required.
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