Set DPD interval time to detect if the remote side fails.
Set DPD timeout. Range: 10-3600.
The head of IP packet will be compressed after it's enabled.
Select from "NONE", "GRE" and "L2TP" to enable VPN over
IPsec function.
Table 3-3-2-3 IPsec Parameters
3.3.2.3 GRE
Generic Routing Encapsulation (GRE) is a protocol that encapsulates packets in order to
route other protocols over IP networks. It’s a tunneling technology that provides a channel
through which encapsulated data message can be transmitted and encapsulation and
decapsulation can be realized at both ends.
In the following circumstances the GRE tunnel transmission can be applied:
- GRE tunnel can transmit multicast data packets as if it were a true network interface.
Single use of IPSec cannot achieve the encryption of multicast.
- A certain protocol adopted cannot be routed.
- A network of different IP addresses shall be required to connect other two similar
networks.
Figure 3-3-2-5
Check to enable GRE function.
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