Netgear DG834G User Manual download pdf (Page 105)

Reference Manual for the ADSL Modem Wireless Router DG834G

Advanced Configuration 7-11

v1.2, October 2006

Using 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.

Static Route Example

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 192.168.0.100.

• Your company’s network 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 as the modem router, and a second static route was created to your local

network for all 192.168.0.x addresses. With this configuration, if you attempt to access a device on

the 134.177.0.0 network, your router will forward your request to the ISP. The ISP forwards your

request to the company where you are employed, and the request will likely 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 192.168.0.100. The static route would look like Figure 7-6.

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 Modem Router IP Address fields specifies that all traffic for these addresses should be

forwarded to the ISDN router at 192.168.0.100.

• A Metric value of 1 will work since the ISDN router is on the LAN.

This represents the number of routers between your network and the destination. This is a

direct connection so it is set to 1.

• Private is selected only as a precautionary security measure in case RIP is activated.

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Netgear DG834G User Manual Page 105