IES-5000/5005/6000 Support Notes
802.1ag CFM
What is CFM?
IEEE 802.1ag Connectivity Fault Management (CFM) allows service providers to manage each customer service instance individually. A customer service instance, or Ethernet Virtual Connection (EVC),is the service that is sold to a customer and is designated by the
This function would be absolutely critical in the following scenarios:
1.A SNMP trap indicates a fault has occurred in the network. How does the service provider know exactly which customers are affected, particularly if there are complex failover mechanisms in place?
2.An instance has failed. How does the service provider discover this?
3.A link or devices in an instance fails. How do the other devices find out so they can reroute around the failure.
4.An instance was just installed. How does the service provider confirm that it is operational?
802.1ag providers the tools to do all of the above easily and quickly, thus reducing operating costs, increasing availability.
Customer
Operator A | Operator B | Operator C |
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| Provider |
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| Customer |
| Customer CFM |
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| Provider |
| Provider CFM |
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Operator | Operator | Operator | Operator CFM | |
•Customer detects failure: diagnose and isolate the failure, report to providers
•Provide detects failure: diagnose and isolate the failure, report to operators
•Operator detects failure: diagnose and find out root causes
•MS: Management System
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