ETH-CSF specifications

This section details specifications for this feature.

ETH-CSF is applicable only to point-to-point Ethernet transport applications, which means that it can work only with Down MEPs.

The following specific configuration information is required by an MEP to support ETH-CSF transmission:

• Local MEG (or MD) level: MEG (or MD) level at which the initiating MEP operates
• ETH-CSF transmission period: Determines transmission periodicity of frames with ETH-CSF information
• Priority: Identifies the priority of frames with ETH-CSF information
• Drop eligibility: Frames with ETH-CSF information are always marked as drop ineligible

The following specific configuration information is required by an MEP to support ETH-CSF reception:

• Local MEG (or MD) level: MEG (or MD) level at which the receiving MEP operates

Note

An MIP is transparent to frames with ETH-CSF information and therefore does not require any information to support ETH-CSF functionality.

The ETH-CSF message indicates also the type of defect. Three CSF defect types are currently defined:

• Client Loss of Signal (C-LOS)
• Client Forward Defect Indication (C-FDI)
• Client Reverse Defect Indication (C-RDI)

The PDU used to convey ETH-CSF information is referred to as the CSF PDU. Frames carrying the ETH-CSF indications are also referred to as CSF frames.