Draytek Vigor3900 User Manual page 94

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Save – Click this button to save the setting.
MTU/MRU Type the value of MTU/MRU. The default value is 1500.
Connection Select a detecting mode for this WAN interface. There are
three ways ARP, PING and HTTP supported in Vigor
Detection Mode
router for you to choose to send the request out.
Connection Add – click this button to have a field for adding a new IP
Detection Host 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. This function
is available when Connection Detection Mode is set with
PING or HTTP.
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.
Click it to save the configuration and exit the dialog.
Apply
– click the icon to remove the selected entry.
– click the icon to remove the selected entry.
86 Vigor3900 Series User's Guide