Netgear FVX538 FVX538 Reference Manual - Page 208

C-15, Gateway-to-Gateway Example, Dual WAN Ports, After Rollover

Page 208 highlights

ProSafe VPN Firewall 200 FVX538 Reference Manual The IP addresses of the gateway WAN ports can be either fixed or dynamic, but a fully-qualified domain name must always be used because the active WAN ports could be either WAN_A1, WAN_A2, WAN_B1, or WAN_B2 (i.e., the IP address of the active WAN port is not known in advance). After a rollover of a gateway WAN port (Figure C-15), the previously inactive gateway WAN port becomes the active port (port WAN_A2 in this example) and one of the gateway VPN firewalls must re-establish the VPN tunnel. 10.5.6.0/24 Gateway-to-Gateway Example (Dual WAN Ports, After Rollover) 172.23.9.0/24 LAN IP 10.5.6.1 Gateway A VPN Router (at office A) WAN_A1 IP (N/A) WAN_A1 port inactive X X WAN_B1 IP netgearB.dyndns.org Gateway B netgear.dyndns.org WAN_A2 IP X X WAN_B2 port inactive WAN_B2 IP (N/A) VPN Router Fully-Qualified Domain Names (FQDN) (at office B) - required for Fixed IP addresses - required for Dynamic IP addresses One of the gateway routers must re-establish VPN tunnel after a rollover LAN IP 172.23.9.1 Figure C-15 The purpose of the fully-qualified domain names is this case is to toggle the domain name of the failed-over gateway firewall between the IP addresses of the active WAN port (i.e., WAN_A1 and WAN _A2 in this example) so that the other end of the tunnel has a known gateway IP address to establish or re-establish a VPN tunnel. C-16 Network Planning for Dual WAN Ports v1.0, August 2006

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ProSafe VPN Firewall 200 FVX538 Reference Manual
C-16
Network Planning for Dual WAN Ports
v1.0, August 2006
The IP addresses of the gateway WAN ports can be either fixed or dynamic, but a fully-qualified
domain name must always be used because the active WAN ports could be either WAN_A1,
WAN_A2, WAN_B1, or WAN_B2 (i.e., the IP address of the active WAN port is not known in
advance).
After a rollover of a gateway WAN port (
Figure C-15
), the previously inactive gateway WAN port
becomes the active port (port WAN_A2 in this example) and one of the gateway VPN firewalls
must re-establish the VPN tunnel.
The purpose of the fully-qualified domain names is this case is to toggle the domain name of the
failed-over gateway firewall between the IP addresses of the active WAN port (i.e., WAN_A1 and
WAN _A2 in this example) so that the other end of the tunnel has a known gateway IP address to
establish or re-establish a VPN tunnel.
Figure C-15
Gateway A
netgearB.dyndns.org
WAN_A1 port inactive
10.5.6.0/24
172.23.9.0/24
172.23.9.1
10.5.6.1
WAN_A1 IP (N/A)
WAN_B1 IP
LAN IP
LAN IP
Gateway B
Gateway-to-Gateway Example
(Dual WAN Ports, After Rollover)
Fully-Qualified Domain Names (FQDN)
- required for Fixed IP addresses
- required for Dynamic IP addresses
VPN Router
(at office A)
VPN Router
(at office B)
WAN_B2 IP (N/A)
WAN_A2 IP
netgear.dyndns.org
WAN_B2 port inactive
One of the gateway routers must re-establish VPN tunnel after a rollover
X
X
X
X