C-4 User’s Reference Guide
Network configuration
Below is a diagram of a simple network configuration. The ISP is providing a Class C address to the customer
site, and both networks A and B want to gain Internet access through this address. Netopia R2020 B connects
to Netopia R2020 A and is provided Internet access through Routers A and B.
Router A:
IP Address: 10.0.0.1
Subnet Mask: 255.255.255.0
Router B:
IP Address: 192.168.1.1
Subnet Mask: 255.255.255.128
Remote IP: 10.0.0.1
Remote Sub: 255.255.255.0
Gateway: 10.0.0.1
Static Route:
192.168.1.128 [network]
255.255.255.128 [mask]
192.168.1.2 [via router]
Usable IP Addresses available to
Customer Site A: 192.168.1.1 -->
192.168.1.126
Netopia R2020 A:
IP Address: 192.168.1.2
Subnet Mask:
255.255.255.128
Remote IP: 192.168.1.129
Remote Sub:
255.255.255.128
Gateway: 192.168.1.1
Usable IP Addresses avail-
able to Customer Site A:
192.168.1.1 -->
192.168.1.126
PC 1:
IP Address: 192.168.1.3
Subnet Mask:
255.255.255.128
Gateway: 192.168.1.1
PC 2:
IP Address:
192.168.1.130
Subnet Mask:
255.255.255.128
Gateway:
192.168.1.129
Netopia R2020 B:
IP Address: 192.168.1.129
Subnet Mask: 255.255.255.128
Remote IP: 192.168.1.2
Remote Sub: 255.255.255.128
Gateway: 192.168.1.2
Usable IP Addresses available to
Customer Site B: 192.168.1.129
--> 192.168.1.254
ISP Network
Internet
Customer Site A
Customer Site B
LAN
LAN
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