Netgear SRX5308 SRX5308 Reference Manual - Page 335

VPN Gateway-to-Gateway: Dual Gateway WAN Ports for Load Balancing, B-15

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ProSafe Gigabit Quad WAN SSL VPN Firewall SRX5308 Reference Manual After a rollover of a gateway WAN port, the previously inactive gateway WAN port becomes the active port (port WAN_A2 in Figure B-15), and one of the gateways must reestablish the VPN tunnel. Figure B-15 The purpose of the FQDNs is to toggle the domain name of the rolled-over gateway between the IP addresses of the active WAN port (that is, WAN_A1 and WAN_A2 in Figure B-15) so that the other end of the tunnel has a known gateway IP address to establish or reestablish a VPN tunnel. VPN Gateway-to-Gateway: Dual Gateway WAN Ports for Load Balancing In a configuration with two dual-WAN port VPN gateways that function in load balancing mode, either of the gateway WAN ports at one end can be programmed in advance to initiate the VPN tunnel with the appropriate gateway WAN port at the other end as necessary to manage the loads of the gateway WAN ports because the IP addresses of the WAN ports are known in advance. Figure B-16 The IP addresses of the gateway WAN ports can be either fixed or dynamic. If an IP address is dynamic, you must use an FQDN. If an IP address is fixed, an FQDN is optional. Network Planning for Multiple WAN Ports v1.0, April 2010 B-15

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ProSafe Gigabit Quad WAN SSL VPN Firewall SRX5308 Reference Manual
Network Planning for Multiple WAN Ports
B-15
v1.0, April 2010
After a rollover of a gateway WAN port, the previously inactive gateway WAN port becomes the
active port (port WAN_A2 in
Figure B-15
), and one of the gateways must reestablish the VPN
tunnel.
The purpose of the FQDNs is to toggle the domain name of the rolled-over gateway between the IP
addresses of the active WAN port (that is, WAN_A1 and WAN_A2 in
Figure B-15
) so that the
other end of the tunnel has a known gateway IP address to establish or reestablish a VPN tunnel.
VPN Gateway-to-Gateway: Dual Gateway WAN Ports for Load Balancing
In a configuration with two dual-WAN port VPN gateways that function in load balancing mode,
either of the gateway WAN ports at one end can be programmed in advance to initiate the VPN
tunnel with the appropriate gateway WAN port at the other end as necessary to manage the loads of
the gateway WAN ports because the IP addresses of the WAN ports are known in advance.
The IP addresses of the gateway WAN ports can be either fixed or dynamic. If an IP address is
dynamic, you must use an FQDN. If an IP address is fixed, an FQDN is optional.
Figure B-15
Figure B-16