Draytek Vigor3900 User Manual page 335

DPD Delay
DPD Timeout
Route/NAT Mode
Source IP
Apply NAT Policy
Apply
Cancel
5. After filling the required information for Advanced, click the GRE tab to open the
following page.
Available parameters are listed as follows:
Item
Enable GRE
Function
Vigor3900 Series User's Guide
Disable – Click it to disable DPD.
The keep-alive timer. A Hello message will be emitted
periodically when a tunnel is idle. Use the value 0 to disable
this function. The recommended value is 30 seconds if
enabled.
The timeout timer. The peer will be declared dead once no
acknowledge message is received after timeout value. Use
the value 0 to disable this function. The recommended value
is 120 seconds if enabled.
If the remote network only allows you to dial in with single
IP, please choose this mode, otherwise please choose Route
Mode.
Choose one of the LAN profiles as a source IP.
Enable – This option allows for performing one-to-one NAT
for all traffic flowing across the VPN.
Translated Local Network – Specify the IP address with
subnet mask of the network that all traffic will be translated
into.
Click it to save the configuration.
Click it to exit the page without saving the configuration.
Description
Check the box to enable the function.
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