Known limitations for the Mellanox SR-IOV plug-in

The Mellanox SR-IOV plug-in is fully integrated into Mirantis OpenStack 5.1 but it has some known limitations:

The Mellanox SR-IOV plugin has been tested against guest images of the following Linux distributions:
- CentOS 6.4 with kernel 2.6.32-358.el6.x86
- Ubuntu 13.10 with kernel 3.11.0-26-generic
By default, up to 16 virtual functions (VFs) can be configured. To use more VFs in the compute nodes, you must make additional configuration changes manually or through a script.
3rd party adapters based on the Mellanox chipset may not have SR-IOV enabled by default. In such a case, please contact the device manufacturer for configuration instructions and for the required firmware.
Mellanox OEM adapter cards may be burned with SR-IOV disabled. In such cases, you may need to burn a special firmware version to enable SR-IOV.
External network is not configured when changing the ML2 mechanism to Mellanox and Open vSwitch. When installing Centos HA with Neutron with VLAN and changing the ML2 mechanism to Mellanox and Open vSwitch, the external network is not configured after deployment. See LP1369988.
Mellanox provides additional information in their HowTo Install Mirantis Fuel 5.1 OpenStack with Mellanox Adapters Support document, including example images to use with the Mellanox SR-IOV plugin and advanced configuration instructions (for example, instructions to increase the number of virtual functions). and advanced configuration instructions.