Advanced Configuration
63
N300 Wireless ADSL2+ Modem Router DGN2200Mv2
Static Routes
Static routes provide additional routing information to your router. Under normal
circumstances, the router has adequate routing information after it has been configured for
Internet access, and you do not need to configure additional static routes. You must configure
static routes only for unusual cases such as multiple routers or multiple IP subnets located on
your network.
As an example of when a static route is needed, consider the following case:
•
Your primary Internet access is through a cable modem to an ISP.
•
You have an ISDN router on your home network for connecting to the company where
you are employed. This router’s address on your LAN is 10.0.0.100.
•
Your company’s network address is 134.177.0.0.
When you first configured your router, two implicit static routes were created. A default route
was created with your ISP to the wireless modem router, and a second static route was
created to your local network for all 10.0.0.x addresses. With this configuration, if you attempt
to access a device on the 134.177.0.0 network, your router forwards your request to the ISP.
The ISP forwards your request to the company where you are employed, and the request is
likely to be denied by the company’s firewall.
In this case you must define a static route, telling your router that 134.177.0.0 should be
accessed through the ISDN router at 10.0.0.100.
In this example:
•
The
Destination IP Address
and
IP Subnet Mask
fields specify that this static route
applies to all 134.177.x.x addresses.
•
The
Gateway IP Address
field specifies that all traffic for these addresses should be
forwarded to the ISDN router at 10.0.0.100.
•
The value in the
Metric
field represents the number of routers between your network and
the destination. This is a direct connection, so it can be set to the minimum value of 2.
•
The
Private
check box is selected only as a precautionary security measure in case RIP
is activated.
To add a static route
1.
Select
Advanced > Static Routes
.
