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:
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.
RP OIR/VM reload without impacting learnt CFM peer MEPs.
Process restart without impacting CFM sessions.
Static MEPs.
Restrictions for configuration of CFM on bundles
Following are the restrictions for configuring CFM over bundle member interfaces:
Only Layer 2 bundle Ethernet interfaces and sub-interfaces are supported, which are part of a L2VPN cross-connect.
No support for 3.3 ms and 10 ms CCM interval.
Supports 5000 pps rates of CCM traffic for bundle interfaces.
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.
Multiple MEPs of different directions are not supported on the same interface or Xconnect.
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.