ARP monitor

The ARP monitor checks the links by periodically sending ARP packets to the designated targets. If there is no reply from a certain device, it considers the device to be down. The ARP monitor generates regular traffic by issuing ARP probes. The ARP monitor is not supported by all of the bonding modes. Requested options are:
Specifies the ARP link monitoring frequency in milliseconds. The default value is 0, which disables the ARP monitor. A reasonable value could be 1000.
These are the IP addresses of targets of the ARP request sent to determine the health of the link to the targets. Multiple IP addresses must be separated by a comma. At least one IP address must be given for ARP monitoring to function. The maximum number of targets that can be specified is 16.
Figure 1. Example: Using the ARP monitor