Thanks for the reply
Well at the moment I have been chopping things up. But.....
# cat /etc/issue
Red Hat Enterprise Linux Server release 6.6 (Santiago)
Kernel \r on an \m
# uname -a
Linux ark-tyo10 2.6.32-431.20.3.el6.x86_64 #1 SMP Fri Jun 6 18:30:54 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux
which I rolled back to from 2.6.32-504.el6.x86_64
# lspci -v |grep -i "mell"
41:00.0 Ethernet controller: Mellanox Technologies MT27500 Family [ConnectX-3]
Subsystem: Mellanox Technologies Device 0049
One command I tired was ./install.pl --vma-eth from MLNX_OFED_LINUX-2.1-1.0.0-rhel6.5-x86_64/src/MLNX_OFED_SRC-2.1-1.0.0
Which has worked in the past......