Draytek Vigor3900 User Manual page 96

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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.
It is used to identify the vendor type and the configuration
Vendor Class ID
(option 60) of a DHCP client.
DHCP Client ID Type a string (in the field of Username) for identification of
(option 61) client. It is required for the mode, DHCP (option 61).
Specify username and password as the DHCP client
identifier for some ISP.
Username – Type a name for authentication.
Password – It is optional. If you want, simply type a
password for authentication if you want.
Enable – Click it to enable the function of DNS specified.
Specify DNS
It is used for local service (e.g., NTP, ping diagnostic) or
used for forwarding packets to PC on LAN/VPN.
Disable – Click it to disable the function of DNS specified.
DNS Add – click this button to have a field for adding a new IP
address.
Save – click this button to save the setting.
– click the icon to remove the selected entry.
– click the icon to remove the selected entry.
88 Vigor3900 Series User's Guide