Billion BiPAC 4500NZ(L) User Manual page 85

IKE negotiates and establishes SA on behalf of IPSec, an IKE SA is used by IKE.
 Phase 1 (IKE): To issue an initial connection request for a new VPN tunnel. The range can be
from 5 to 15,000 minutes, and the default is 480 minutes.
 Phase 2 (IPSec): To negotiate and establish secure authentication. The range can be from 5 to
15,000 minutes, and the default is 60 minutes. A short SA time increases security by forcing the
two parties to update the keys. However, every time the VPN tunnel re-negotiates, access
through the tunnel will be temporarily disconnected.
PING for Keep Alive:
 None: The default setting is None. To this mode, it will not detect the remote IPSec peer has
been lost or not. It only follows the policy of Disconnection time after no traffic, which the remote
IPSec will be disconnected after the time you set in this function.
 PING: This mode will detect the remote IPSec peer has lost or not by pinging specify IP
address.
 DPD: Dead peer detection (DPD) is a keeping alive mechanism that enables the router to be
detected lively when the connection between the router and a remote IPSec peer has lost.
Please be noted, it must be enabled on the both sites.
PING to the IP: It is able to IP Ping the remote PC with the specified IP address and alert when the
connection fails. Once alter message is received, Router will drop this tunnel connection. Reestablish
of this connection is required. Default setting is 0.0.0.0 which disables the function
Interval: This sets the time interval between Pings to the IP function to monitor the connection status.
Default interval setting is 10 seconds. Time interval can be set from 0 to 3600 second, 0 second
disables the function.
Ping to the IP
0.0.0.0
0.0.0.0
xxx.xxx.xxx.xxx (A valid IP Address)
xxx.xxx.xxx.xxx(A valid IP Address)
Disconnection Time after no traffic: It is the NO Response time clock. When no traffic stage time is
beyond the Disconnection time set, Router will automatically halt the tunnel connection and
re-establish it base on the Reconnection Time set. 180 seconds is minimum time interval for this
function.
Reconnection Time: It is the reconnecting time interval after NO TRAFFIC is initiated. 3 minutes is
minimum time interval for this function.
Click SAVE to submit the settings.
Interval (sec)
0
2000
0
2000
82
Ping to the IP Action
No
No
No
Yes, activate it in every 2000
second.