Re: echo rdma 20049 > /proc/fs/nfsd/portlist return Protocol not supported

[Chandler <admin@xxxxxxxxxxxxxxxxxx>]

Mellanox did remove NFS RDMA support from their software a while ago, so 
that is why you see the error.  As far as I know, the only way to make 
it work is to remove the MLNX_OFED software and use CentOS Infiniband 
drivers.  Although we did have system freezes in CentOS 6.9 with NFS 
RDMA and so had to revert to the IPoIB interface.  Hopefully you'll have 
better luck with CentOS 7.