Interface Monitoring - D-Link DFL-1100 User Manual

Now login to the slave firewall and click on System in the menu bar, and then click HA
below it; in this screen you will click on Receive configuration from first unit. You will need
to fill in the cluster id configured on the first unit. When you click Apply the unit should
transfer the configuration from the first unit and you HA cluster should be operating.

Interface Monitoring

When HA is configured it's possible to configure something called Interface Monitoring,
this is used to monitor up to 6 IP addresses on each segment (LAN/WAN or DMZ) of the DFL-
1100 cluster. If 50% of the listed addresses are unreachable for several seconds the active
node will failover and the other unit will become active.