Configuring Ethernet OAM Ethernet OAM Overview
OmniSwitch AOS Release 7 Network Configuration Guide June 2013 page 35-7
Interoperability with ITU-T Y.1731
This implementation of Ethernet Service OAM supports both IEEE 802.1ag and ITU-T Y.1731 for
connectivity fault management (plus performance monitoring provided by ITU-T Y.1731). Although both
standards are supported, the OmniSwitch implementation uses the 802.1ag terminology and hierarchy for
Ethernet CFM configuration.
The following table provides a mapping of 802.1ag terms to the equivalent ITU-T Y.1731 terms:
Support for both the IEEE and ITU-T Ethernet CFM standards allows interoperability between
OmniSwitch 802.1ag and Y.1731 CFM with the following minor configuration requirements:
• The OmniSwitch MD format must be configured as “none”.
• ITU-T Y.1731 uses the “icc-based” format for a MEG, so the OmniSwitch MA format must also be
configured to use the “icc-based” format.
• When the OmniSwitch MA is configured with the “icc-based” format, the MA name is automatically
padded with zeros if the name specified is less than 13 characters.
The OmniSwitch CLI commands to configure an MD and MA include the “none” and “icc-based” format
options. See “Configuring Ethernet OAM” on page 35-9 for more information.
IEEE 802.1ag v8.1 ITU-T Y.1731
Maintenance Domain (MD) Maintenance Entity (ME)
Maintenance Association (MA) Maintenance Entity Group (MEG)
Maintenance Endpoint (MEP) MEG Endpoint (MEP)
Maintenance Intermediate Point (MIP) MEG Intermediate Point (MIP)
Maintenance Domain Level MEG Level
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