Ethernet Cfm And Ethernet Oam Interaction - Cisco Catalyst 4500 series Administration Manual

Chapter 66 Configuring Ethernet OAM and CFM

Ethernet CFM and Ethernet OAM Interaction

You can also configure the OAM Manager infrastructure to interact between CFM and Ethernet OAM.
When the Ethernet OAM protocol is running on an interface that has CFM MEPs configured, Ethernet
OAM informs CFM of the state of the interface. Interaction is unidirectional from the Ethernet OAM to
the CFM protocol, and the only information exchanged is your (user) network interface port status.
The Ethernet OAM protocol notifies CFM when these conditions occur:
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This section includes this information:
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For more information about CFM and interaction with Ethernet OAM, see the Ethernet Connectivity
Fault Management feature module at this URL:
http://www.cisco.com/en/US/docs/ios/12_2sr/12_2sra/feature/guide/srethcfm.html
Configuring Ethernet OAM Interaction with CFM
For Ethernet OAM to function with CFM, you must configure an Ethernet Virtual Circuit (EVC) and the
OAM manager, and associate the EVC with CFM. You must use an inward facing MEP for interaction
with the OAM manager.
Note If you configure, change, or remove a UNI service type, EVC, Ethernet service instance, or CE-VLAN
configuration, all configurations are verified to ensure that the UNI service types match the EVC
configuration and that Ethernet service instances are matched with the CE-VLAN configuration.
Configurations are rejected if the pairs do not match.
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Error thresholds are crossed at the local interface.
CFM responds to the notification by sending a port status of Local_Excessive_Errors in the Port
StatusType Length Value (TLV).
Ethernet OAM receives an OAM PDU from the remote side showing that an error threshold is
exceeded on the remote endpoint.
CFM responds to the notification by sending a port status of Remote_Excessive_Errors in the Port
Status TLV.
The local port is set into loopback mode.
CFM responds by sending a port status of Test in the Port Status TLV.
The remote port is set into loopback mode.
CFM responds by sending a port status of Test in the Port Status TLV.
Configuring Ethernet OAM Interaction with CFM, page 66-51
Example: Configuring Ethernet OAM and CFM, page 66-53
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
Ethernet CFM and Ethernet OAM Interaction
66-51