Draytek Vigor3900 User Manual page 98

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If you choose PING/HTTP as Connection Detection Mode,
Connection
Detection Host you have to specify the detection host address in this field.
Use the default setting.
Add – Click this button to have a field for adding a new IP
address. Assign an IP address or Domain name as a
destination to be detected whether the host is active (sending
reply to the router) or not. If not, the connection of WAN
interface will be regarded as breaking down.
Save – click this button to save the setting.
Connection
Assign an interval period of time for each detecting.
Detection Interval
Connection
Assign detecting times to ensure the connection of the WAN
Detection Retry
interface. After passing the times you set in this field and no
reply received by the router, the connection of WAN
interface will be regarded as breaking down.
IP Alias Type other IP addresses to be bound to this interface. This
setting is optional. If you have typed addresses here, you
can see and choose it in later web page settings (e.g.,
NAT>>Port Redirection/DMZ Host).
Add – Click this button to display the IP address field for
adding a new IP address. Type the IP address on the tiny
boxes one by one.
Save – After finished the IP address configuration, click
Save to save the setting onto the router.
– click the icon to remove the selected entry.
90 Vigor3900 Series User's Guide