User guide

Chapter 3. Configuring Router Software 73
Sample Configuration 3: Configuring a Dual-Ethernet Router for IP
Routing
Scenario:
The following example provides a simple sample configuration for a Dual-Ethernet router (eth_router) with
IP routing enabled.
The routerÕs hub (ETH/0) belongs to the 192.168.254.0 subnet. The routerÕs ETH/1 belongs to the
192.168.253.0 subnet.
ETH/0 will route packets to ETH/1 at the address 192.168.253.254. DHCP is enabled for both subnets.
eth_router ConÞguration
ConÞguration
Section
Item Commands
System Settings
Name System Name (optional) system name eth_router
Message Message (optional) system msg ConÞgured_Jan_1999
Ethernet Settings
Routing/ Bridging
Controls
Enable IP routing eth ip enable
Disable bridging eth br disable
ETH/0 IP Address DeÞne ETH/0 IP address for
the hub side
eth ip addr 192.168.254.254 255.255.255.0 0
ETH/1 IP Address DeÞne ETH/1 IP address for
the single 10Base-T side
eth ip addr 192.168.253.254 255.255.255.0 1
TCP/IP default route
address
ETH/0 sends all trafÞc to
ETH/1
eth ip addroute 0.0.0.0 255.255.255.255
192.168.253.254 1 1
DHCP Settings
DHCP Settings DeÞne DHCP network for
ETH/1
dhcp add 192.168.253.0 255.255.255.0
Create an address pool for
ETH/1
dhcp set addresses 192.168.253.2 192.168.253.20
DNS Domain Name dhcp set valueoption domainname myISP.com
DNS Server dhcp set valueoption domainnameserver
192.168.200.1
WINS Server Address dhcp set valueoption winsserver 172.16.0.2