Using Internet Setup
In this field...
P
robe Next Hop
82
Do this...
Select this option to automatically detect loss of connectivity to the default
gateway. If you selected LA
default gateway. I
f you selected PPTP, PPPoE, or Dialup, this is done by
sending PPP echo reply (LCP) messages to the PPP peer.
By default, if the defau
lt gateway does not respond, the Internet
connection is considered to be down.
If it is deter
mined that the Internet connection is down, and two Internet
connections are defined, a failover will be performed to the second
Internet connection, ensuring continuous Internet connectivity.
This option is selected by default.
N, this is done by sending ARP requests to the
D-Link NetDefend firewall User Guide