Billion Electric Company BiGuard 30 - Manual (Page 31)

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planning. The following sections demonstrate the various ways of using BiGuard 30
to setup your VPN.
2.6.2 VPN Planning - Fail Over
Configuring your VPN with Fail Over allows BiGuard 30 to automatically default to
WAN2 should WAN1 fail.
Because the dynamic domain name biguard.billion.com is configured for both WAN1
and WAN2, the active WAN port will announce the domain name through the WAN IP
address. The remote gateway will then be able to connect to the VPN through the
domain name.
In this Gateway to Gateway example, BiGuard 30 is communicating to a remote
gateway using WAN1 through a secure VPN tunnel. Should WAN1 fail, outbound
traffic from BiGuard 30 will automatically be redirected to WAN2. This process is
completely transparent to the remote gateway, as BiGuard 30 will automatically
update the domain name (biguard.billion.com) with the WAN2 IP address.
Configuring a Gateway to Multiple Gateway setup with Fail Over is similar, as shown
below:
biguard.billion.com
Before Fail Over
After Fail Over
192.168.2.x
192.168.2.x
200.200.200.1
200.200.200.1
192.168.3.x
192.168.3.x
biguard.billion.com
BiGuard30
BiGuard30
BiGuard10
BiGuard10