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Spirent KB Article
Doc ID: FAQ17387
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Spirent TestCenter: Is multicast destination supported on EOAM Loopback messages?
EOAM Loopback destination address
Yes but only for ITU-T implementation. This is a specification issue. IEEE doesn't support multicast destination for Loopback messages.
3.15 Loopback Message (LBM): A unicast CFM PDU transmitted by a MEP, addressed to a specific MP, in the expectation of receiving an LBR.
7.2 Ethernet Loopback (ETH-LB)
Ethernet Loopback function (ETH-LB) is used to verify connectivity of a MEP with a MIP or peer MEP(s). There are two ETH-LB types:
Product : Spirent TestCenter,EOAM