The server environment is as follows: IBM server, a total of 4 NICs; Operating System: Ubuntu-10.10-server access Intranet, telecommunications and Unicom IP, the information is as follows: 168.168.168.96 Telecommunications (TEL) IP: 125.91.219.252; subnet Mask: 255.255.255.248; Gateway: 125.91.219.249 Unicom (CNC) IP: 120.81.225
The server environment is as follows:
IBM server, with a total of 4 NICs;
Operating System: Ubuntu-10.10-server
The IP address used to connect to the Intranet, telecom, and China Unicom. The information is as follows:
Intranet: 168.168.168.96
China Telecom (TEL) IP: 125.91.219.252; subnet mask: 255.255.255.248; Gateway: 125.91.219.249
China Unicom (CNC) IP: 120.81.225.31; subnet mask: 255.255.255.0; Gateway: 120.81.225.1
The procedure is as follows:
1. Configure Nic Information
Run the sudo vim/etc/network/interfaces command to modify the configuration as follows:
Auto lo
Iface loinet loopback
Auto eth0
Ifaceeth0 inet static
Address 168.168.168.96
Netmask 255.255.255.0
Ifaceeth1 inet static
Address 120.81.225.31
Netmask 255.255.255.0
Auto eth1
Ifaceeth2 inet static
Address 125.91.219.252
Netmask 255.255.255.248
Gateway 125.91.219.249
Auto eth2
Save configuration information and enable the network card
Sudo/etc/init. d/networking restart
2. Added route tables for China Telecom tel and China Unicom cnc
First, check the route table information.
Cat/etc/iproute2/rt_tables
Some routing information is displayed in it. Add the following two sentences after it to save and exit.
252 tel
251 cnc
3. Add routing rules and run the following six commands. The first three commands are to set up the telecom gateway so that the telecom data can be transmitted from the eth2 Nic, and the last three are to set the UNICOM gateway, let the data go from eth1
Sudo ip route flush table tel
Sudo ip route add default via 125.91.219.249 dev eth2 src125.91.219.252 table tel
Sudo ip rule add from 125.91.219.252 table tel
Sudo ip route flush table cnc
Sudo ip route add default via 120.81.225.1 dev eth1 src120.81.225.31 table cnc
Sudo ip rule add from 120.81.225.31 table cnc
4. Run the command sudo vim/etc/init. d/networking to add the following content before exit 0, which is the routing rule just added.
Ip route flush table tel
Ip route add default via 125.91.219.249 dev eth2 src125.91.219.252 table tel
Ip rule add from 125.91.219.252 table tel
Ip route flush table cnc
Ip route add default via 120.81.225.1 dev eth1 src120.81.225.31 table cnc
Ip rule add from 120.81.225.31 table cnc
5. Restart the network to run sudo/etc/init. d/networkingrestart.
By now, the network is pinged by a friend of China Telecom and China Unicom to check whether the network is normal. Another point is that dual-line access is a WEB service, but China Telecom has disabled port 80. You have to call China Telecom to apply for port 80.
6. Write the system startup script and run the command sudovim/etc/rc. local to write the routing Rule Information in Step 4 to the startup script.