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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 192.168.0.10.
•
Your company's network is 134.177.0.0.
When you first configured your Model RP114 router, two implicit static routes were created. A
default route was created with your ISP as the gateway, and a second static route was created to
your local network for all 192.168.x.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 192.168.0.10. The static route would look like
Figure
8-9.
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