Meaning of EFM

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EFM is short for Ethernet in the First Mile. It is also called as Ethernet port OAM or Ethernet link OAM. EFM focuses on point-to-point (E2E) Ethernet links. In addition, it is also called IEEE 802.3ah OAM or ETH-OAM (IEEE 802.3ah) based on the standards compliance.

Other related questions:
Can EFM OAM be associated with an Eth-Trunk
EFM OAM cannot be associated with an Eth-Trunk. EFM OAM can be associated with an interface.

Do S series switches support association between EFM and an Eth-Trunk
S series switches do not support association between EFM and an Eth-Trunk. They support only association between EFM and an interface.

Meaning of CFM
CFM is short for connectivity fault management. It is also called as Ethernet service OAM, and focuses on E2E Ethernet services.

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