After nfs-utils-rdma-server is installed, configured, and running on the
   server, run:

   mount -t nfs4 -o rdma,port=<server port>,vers=4.0
   <ip address or name>:/<share name> /<mount point>
      server port:
         Use the value in the server's /etc/nfs-utils-rdma-server.conf
         (default 20049)
      ip address or name:
         Using an ip address is recommended, since you likely have two routes to
         the server, this forces it to use the RDMA-capable interface.
         NOTE: The ip address is used for basic communication.  The actual file
               data transfers happen using RDMA.
      share name:
         The full path of the directory shared on the server.  i.e. /home/user
      mount point:
         The local mount point you want to use
      NOTE: If you omit vers=4.0, it will default to using v4.2.  v4.1 and
            v4.2 do not yet support RDMA, and you will experience undefined
            behavior - likely the mount will look complete, but when you use
            it (even cd or ls), the command will hang.

nfs-utils-rdma-server

   NOTE: In your /etc/exports or /etc/exports.d/*.exports files, you MUST use
         the insecure option, because the NFS/RDMA client does not use a
         reserved port.  This option ONLY means that the client can be using a
         port less than IPPORT_RESERVED (1024).

   NOTE: If you want to run nfs v4.0+ only, you do not need rpcbind.  In this
         case, change /etc/conf.d/nfs-server.conf to contain:
            NFSD_OPTS="-N 2 -N 3"
         And, on clients, you muse use "mount -t nfs4 ..."