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Environment/Versions Spirent TestCenter EOAM CFM Ethernet OAM Fault Management Answer The Devices has columns called incoming / outgoing links. EOAM link is used to create an EOAM topology.  If want to support something like MEP->MIP->MIP then the arrows would have to be EOAM links.  If you use the MA/MEG wizard and set the “Number of MIPs per MEP” field you will see in the generated config the EOAM link. In more technical details, the link will utilize the MAC from the generating device and that VLANs in front (towards the DUT) to send control plane traffic.  This emulates a L2 topology so we can support Link Trace.   We don’t use this for any other message types, but it does come into play for scaling within a MA/MEG.