Draytek 2910 - Manual (Page 113)

Vigor2910 Series User’s Guide 107
VPN Connection Through Use the drop down menu to choose a proper WAN interface
for this profile. This setting is useful for dial-out only.
WAN1 First - While connecting, the router will use WAN1
as the first channel for VPN connection. If WAN1 fails, the
router will use another WAN interface instead.
WAN1 Only - While connecting, the router will use WAN1
as the only channel for VPN connection.
WAN2 First - While connecting, the router will use WAN2
as the first channel for VPN connection. If WAN2 fails, the
router will use another WAN interface instead.
WAN2 Only - While connecting, the router will use WAN2
as the only channel for VPN connection.
Call Direction Specify the allowed call direction of this LAN-to-LAN profile.
Both:-initiator/responder
Dial-Out- initiator only
Dial-In- responder only.
Always On or Idle Timeout Always On-Check to enable router always keep VPN
connection.
Idle Timeout: The default value is 300 seconds. If the
connection has been idled over the value, the router will drop
the connection.
Enable PING to keep alive This function is to help the router to determine the status of
IPSec VPN connection, especially useful in the case of
abnormal VPN IPSec tunnel disruption. For details, please
refer to the note below. Check to enable the transmission of
PING packets to a specified IP address.
PING to the IP Enter the IP address of the remote host that located at the
other-end of the VPN tunnel.
Enable PING to Keep Alive is used to handle abnormal
IPSec VPN connection disruption. It will help to provide
the state of a VPN connection for router’s judgment of
redial.
Normally, if any one of VPN peers wants to disconnect
the connection, it should follow a serial of packet
exchange procedure to inform each other. However, if the
remote peer disconnect without notice, Vigor router will
by no where to know this situation. To resolve this
dilemma, by continuously sending PING packets to the
remote host, the Vigor router can know the true existence
of this VPN connection and react accordingly. This is
independent of DPD (dead peer detection).
ISDN If you want to connect two networks with ISDN connection,
please select ISDN radio button to build ISDN dial-out
connection to the server. You should set up Link Type and
identity like User Name and Password for the authentication