Install Mellanox Driver

Centos install rpm build tool.

sudo yum install "kernel-devel-uname-r == $(uname -r)"
yum install gcc patch gcc-c++ redhat-rpm-config rpm-build

enable vxlanoff procedure

If you eant to manual enable, you can follow below procedure. PLUMgrid aleady put these into script, so when you start the plumgrid service it will create vxlan interface automatically.

ip link add vxlan9876 type vxlan id 9876 group 239.1.1.1 dev p3p1 dstport 4789
ip link set dev <nic_card> up
ip link set vxlan9876 up
ethtool -K <nic_card> tx-udp_tnl-segmentation on

Veriy Vxlanoff is enabled

ethtool -k <nic_card> |grep tnl

To check the driver version and information

ethtool -i <nic_card>