ZyXEL Communications 792H - Manual (Page 89)

Prestige 792H G.SHDSL Router
WAN 5-9
The following network topology allows you to avoid triangle route security issues 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 Prestige 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 that allow packets from the protected LAN (Subnet 1) to the backup gateway (Subnet 2).
Figure 5-4 Traffic Redirect LAN Setup
5.7 Configuring WAN Backup
The WAN Backup port or CON/AUX port can be used in reserve, if the broadband connection to the WAN
port fails. To set up the auxiliary port (WAN Backup or CON/AUX) for use in the event that the regular
WAN connection is dropped, first make sure you have set up the switch and port connection (see the Quick
Start Guide for Hardware Installation), then configure:
1. WAN Setup (see section 5.5)
2. WAN Backup Setup (see below)
3. Advanced WAN Setup (see section 5.8)