Static routes, Static routes -5 – NETGEAR ADSL2+ Modem Router DM111PSPv2 User Manual
Page 53
ADSL2+ Modem Router DM111PSPv2 User Manual
Advanced Configuration
4-5
v1.0, December 2008
3. In the Assigned IP Address field, type the IP address to assign to the computer or server.
Choose an IP address from the modem router’s LAN subnet, such as 192.168.0.2.
4. Click Apply to enter the reserved address into the table.
To delete a reserved address entry:
1. Click the button next to the reserved address that you want to delete.
2. Click Delete.
Static Routes
Static routes provide additional routing information to your modem router. Under normal
circumstances, the modem 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 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 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 192.168.0.100.
Note: The reserved address will not be assigned until the next time the computer
contacts the DHCP server. Reboot the computer or access its IP configuration
and force a DHCP release and renew.