User`s guide

Vigor3900 Series User’s Guide
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NAT>>Port Redirection/DMZ Host).
To add a new IP address, simply type the IP address on the
box near to the Add button. Next, click Add. The new one
will be added and displayed on the field under the box.
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.
MTU/MRU
Type the value of MTU/MRU. The default value is 1500.
Connection
Detection Mode
Select a detecting mode for this WAN interface. There are
three ways ARP, PING and HTTP supported in Vigor
router for you to choose to send the request out.
Connection
Detection Host
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.
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.
Connection
Detection Interval
Assign an interval period of time for each detecting.
Connection
Detection Retry
Assign detecting times to ensure the connection of the WAN
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.