The next step is to enable port 4789 for VXLAN UDP traffic. Please run the following command to make this change:
```
$ echo “options vxlan udp_port=4789" > /etc/modprobe.d/vxlan.conf
```
Once this configuration is made, the initial file system that is loaded into the memory needs to be updated so that it picks up the new configuration.
```
$ sudo dracut -v
```
Load the VXLAN module
```
$ sudo modprobe vxlan
```
Please reboot the machine to ensure that the configuration changes are written to the disk and that the VXLAN offload module is loaded.
```
$ reboot
```
Verify that the VXLAN module has been loaded with the following command
```
$ lsmod | grep vxlan
```
Verify that the correct UDP port has been set for VXLAN offloading (note: the output should be “4789”
```
$ cat /sys/module/vxlan/parameters/udp_port
```

The following files have to be replaced:

a. /opt/pg/scripts/systemd_post_start.sh 
b. /opt/pg/scripts/systemd_post_stop.sh 
c. /etc/init/plumgrid.conf

Restart PLUMgrid services on the node with the following command:
```
$ service plumgrid stop; sleep 30; service plumgrid start
```
Verify that the Mellanox interface has VXLAN offloading enabled:
```
$ ethtool -k <interface name> | grep udp
```

Centos

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