Lantronix SISPM1040-xxxx-L3 Web User Guide
33856 Rev. A https://www.lantronix.com/ 292
CFM > MEP
Configure CFM MEP parameters on this page. This switch supports two types of MEP: Port Down-MEPs and
VLAN Down-MEPs.
Port Down-MEPs: In 802.1Q terminology, Port MEPs are located below the EISS entity, that is, closest to the
physical port. Port MEPs are used by e.g., APS for protection purposes.
Port MEPs are created when the encompassing service has type "Port".
Port MEPs may send OAM PDUs tagged or untagged. An OAM PDU will be sent untagged only if the MEP's
VLAN is set to "Inherit" (0). Any other value will cause it to be sent tagged with the port's TPID, whether or not the
VLAN matches the port's PVID and that PVID is meant to be sent untagged.
VLAN Down-MEPs: In 802.1Q terminology, VLAN MEPs are located above the EISS entity.
This means that tagging of OAM PDUs will follow the port's VLAN configuration.
Thus, if a VLAN MEP is created on the Port's PVID and PVID is configured to be untagged, OAM PDUs will be
transmitted untagged.
VLAN MEPs are created when the encompassing service has type "VLAN".
Down-MEP creation rules: There are a few rules to obey when creating Down-MEPs:
1. There can only be one Port MEP on the same port.
2. There can only be one VLAN MEP on the same port and VLAN.
3. A VLAN MEP must have a higher MD/MEG level than a Port MEP on the same port and VLAN.
These checks are performed automatically on administratively enabled MEPs when you change a particular MEP,
change the Service Type from Port to VLAN or vice versa, or change the domain's MD/MEG level.
Parameter Descriptions:
Delete: Check to delete the entry. It will be deleted during the next save.
Domain: Name of Domain under which this MEP resides.
Service: Name of Service under which this MEP resides.
MEPID: The identification of this MEP. Must be an integer [1..8091]
Direction: Set whether this MEP is an Up-MEP or a Down-MEP.
Port: Port on which this MEP resides.
VLAN: VLAN ID. Use the value 0 to indicate untagged traffic (implies a port MEP).
PCP: Choose PCP value in PDUs' VLAN tag. Not used if untagged.
SMAC: Set a Source MAC address to be used in CCM PDUs originating at this MEP. Must be a unicast address.
Format is XX:XX:XX:XX:XX:XX. If all-zeros, the switch port's MAC address will be used instead.
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