This topic describes CFM support over bundle interfaces, bundle sub-interfaces, and bundle member interfaces, where the bundle member ports must span across line cards.
CFM over bundle supports the following:
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CFM Maintenance Points — UP MEP, Down MEP, which only includes L2 bundle main and sub-interfaces.
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CCM interval of 100 ms, 1 sec, 10 sec, 1 min, and 10 mins.
CCM interval of 3.3 ms, 10 ms, 100 ms, 1 sec, 10 sec, 1 min, and 10 mins.
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RP OIR/VM reload without impacting learnt CFM peer MEPs.
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Process restart without impacting CFM sessions.
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Static MEPs.
Restrictions for configuration of CFM on bundles
Following are the restrictions for configuring CFM over bundle member interfaces:
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Only Layer 2 bundle Ethernet interfaces and sub-interfaces are supported, which are part of a L2VPN cross-connect.
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No support for 3.3 ms and 10 ms CCM interval.
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Supports 5000 pps rates of CCM traffic for bundle interfaces.
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Ethernet Connectivity Fault Management (CFM) is not supported with Maintenance association End Points (MEPs) that are configured on default and untagged encapsulated sub-interfaces that are part of a single physical interface.
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Multiple MEPs of different directions are not supported on the same interface or Xconnect.
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CFM does not support fast failover, which may result in session flaps on bundle interfaces. Use offload for virtual interfaces to avoid flaps on faster CCM intervals.