Figure 8-6 Traffic Redirect; Figure 8-7 Traffic Redirect - ZyXEL Communications Vantage CNM 2.0 User Manual

Vantage CNM 2.0
8.1.3 Dial Backup – ZyWALL
Vantage can communicate with the device using Dial Backup if the main WAN connection goes down.
Traffic Redirect
Traffic redirect forwards WAN traffic to a backup gateway when the ZyWALL cannot connect to the Internet
through its normal gateway. Connect the backup gateway on the WAN so that the ZyWALL still provides
firewall protection. This feature is not available on all models.
Figure 8-6 Traffic Redirect WAN Setup
The following network topology allows you to avoid triangle route security issues (see ZyWALL Appendices)
when the backup gateway is connected to the LAN or DMZ. Use IP alias to configure the LAN into two or three
logical networks with the ZyWALL 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 a LAN
to LAN/ZyWALL firewall rule that forwards packets from the protected LAN (Subnet 1) to the backup gateway
(Subnet 2).
Figure 8-7 Traffic Redirect LAN Setup
8-10 Configuration > WAN