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8
IP Routing
Tunnel Default Gateway
Enter the IP address of the default gateway for tunneled data. Use dotted decimal notation; e.g.,
10.10.0.2
To delete a configured tunnel default gateway, enter 0.0.0.0 .
This gateway is often a firewall in parallel with the VPN Concentrator and between the public and private
networks. The tunnel default gateway applies to all tunneled traffic, including IPSec LAN-to-LAN
traffic.
Note:
If you use an external device instead of the VPN Concentrator for NAT (Network Address Translation),
you must configure the tunnel default gateway.
Override Default Gateway
To allow default gateways learned via RIP or OSPF to override the configured Default Gateway , check the
box (the default). To always use the configured Default Gateway , clear the box.
Apply / Cancel
To apply the settings for default gateways, and to include your settings in the active configuration, click
Apply
Gateway
screen.
Reminder:
To save the active configuration and make it the boot configuration, click the Save Needed icon at the
top of the Manager window.
To discard your entries, click Cancel . The Manager returns to the Configuration | System | IP Routing screen.
Configuration | System | IP Routing | OSPF
This screen lets you configure system-wide parameters for the OSPF (Open Shortest Path First) routing
protocol. You must also configure interface-specific OSPF parameters on the Configuration | Interfaces
screens.
OSPF is a protocol that the IP routing subsystem uses for messages to other OSPF routers within an
internal or private network, to determine network connectivity, status, and optimum paths for sending
data traffic. The VPN Concentrator supports OSPF version 2 (RFC 2328).
The complete private network is called an OSPF Autonomous System (AS), or domain. The subnets
within the AS are called areas. You configure OSPF areas on the Configuration | System | IP Routing | OSPF
Areas
8-6
. If you do not use a tunnel default gateway, enter 0.0.0.0 (the default entry).
. The Manager returns to the Configuration | System | IP Routing screen. If you configure a Default
, it also appears in the Static Routes list on the Configuration | System | IP Routing | Static Routes
screens.
VPN 3000 Concentrator Series User Guide
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