I tried to find out which ExtremeSwitching platforms support CFM processing in hardware, but did not find any conclusive information. 😞
Anyway, my understanding is that this feature uses hardware capabilities similar to BFD, and for BFD there is a GTAC Knowledge article with title BFD Hardware Assist feature for 670-G2
that says only the X460-G2 supports it in hardware. The current documentation (OAM -> BFD -> Limitations
) extends this to X460-G2, X690, and X870 switches (the 16.2 documentation
lists just X460-G2 switches).
Thus I would expect that the X670V does not support hardware MEPs and thus always uses software MEPs.
If anybody has additional information, please share. 🙂