you're right, SMP-FT is not supported even until current-latest version 4.5.218 It may be because some VxRail specific tasks or scripts can be in race condition with SMP-FP, such as VxRail Cluster shutdown.   But VxRail may support in future release.if you know more detail, you should get VxRail Xpert Certificates and join exclusive Slack
Hi team,  I've been looking around several old threads where it was stated that vSphere FT feature was not supported by VxRail basically because this feature needs a dedicated Ethernet interface and only two of them make up the base connectivity configuration.  What I read on the new technical deck for VxRail is that on 14th Gen PowerEdge server there are different base connectivity options that allow us to configure 4x10GbE cards which could give us the option to dedicate some of them for prod. traffic and others for FT.  Despite of that, it seems that SMP-FT is not supported yet on VxRail 4.5 with this kind of servers. Is there another reason for that? Maybe this vSphere feature will be added on coming versions?  Many thanks in advance!  Joaquin.
SMP-FT Not supported on VxRail 4.5 - 14th Gen PowerEdge Servers