Traffic Redirect - ZyXEL Communications P-792H User Manual

Chapter 6 WAN Setup
• Normal route: designated by the ISP (see
• Traffic-redirect route (see
For example, if the normal route has a of "1" and the traffic-redirect route has a
metric of "2", then the normal route acts as the primary default route. If the
normal route fails to connect to the Internet, the P-792H v2 tries the traffic-
redirect route next.
If you want the traffic-redirect route route to take priority over the normal route,
all you need to do is set the traffic-redirect route's metric to "1" and the normal
route to "2".
IP Policy Routing overrides the default routing behavior and takes priority over all
of the routes mentioned above.

6.7 Traffic Redirect

Traffic redirect forwards traffic to a backup gateway when the P-792H v2 cannot
connect to the Internet. An example is shown in the figure below.
Figure 30 Traffic Redirect Example
The following network topology allows you to avoid triangle route security issues
when the backup gateway is connected to the LAN. Use IP alias to configure the
LAN into two or three logical networks with the P-792H v2 itself as the gateway for
each LAN network. Put the protected LAN in one subnet (Subnet 1 in the following
figure) and the backup gateway in another subnet (Subnet 2). Configure filters
80
Section 6.2 on page
Section 6.7 on page 80)
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P-792H v2 User's Guide