Sometimes when you try to mount file system (NFS) you will get the following Error:
#mount -o rw server1:/dir /bk mount: 1831-008 giving up on: server1:/dir vmount: Operation not permitted.
to solve this problem, try to change the following network parameter on the client side
#nfso -o nfs_use_reserved_ports=1 Setting nfs_use_reserved_ports to 1