Is this unsupported ?
ipoib_enhanced on SR-IOV vfs not working I have trouble using an ipoib interface on a VF of a connectx-5 device when ipoib_enhanced=1 . It works nicely when switching to connected mode with ipoib_enhanced=0. It's on SL7.9 with MLNXOFED 5.0 and 5.3.
SR-IOV & enhanced IPoIB is supported, and the default mode from MLNX_OFED 4.X and above is enhanced IPoIB.
Are you referring to OL 7.9? In that case, please note that this OS is supported only in MLNX_OFED 5.2-184.108.40.206 / 5.2-220.127.116.11 / 5.2-18.104.22.168.