[jabl]

CLOS fabric topology is the most common deployment with IB, so I'm not sure how that plays into the hands of ethernet?

But yes, seems EVPN + VXLAN is the way the industry is going nowadays to build eth CLOS fabrics, whereas Trill & SPB seem more or less dead, for some reason.

Everybody is saying ethernet is simpler to manage than IB, but IME at least for HPC the opposite is true. IB is more or less plug and play, you get RDMA, multipathing etc. all right out the box. Whereas if you'd set up an equivalent thing with ethernet, you'd have to set up DCB, RoCEv2, EVPN+VXLAN+BGP (or something equivalent).