Draytek Vigor2960 series User Manual page 204

DPD Timeout
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
Local GRE IP
Remote GRE IP
Auto Generate
GRE Key
GRE In Key
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.
Click it to save the configuration.
Click it to exit the page without saving the configuration.
Description
Click Enable to enable such function.
The virtual IP address of the router, specified for this tunnel.
The virtual IP address of the remote client, specified for this
tunnel.
Click Enable to enable such function.
If you click Disable, you have to type GRE In Key and
GRE Out Key respectively.
Type the hexadecimal number as GRE In Key. This value is
used for the router to authenticate the source of the packet.
The length is 4 bytes
196 Vigor2960 Series User's Guide