centos 6.5 双线双网卡双IP配置教程

服务器系统：centos 6.5 64位服务器系统

业务IP

120.41.32.101/26  eth0

36.250.79.101/26  eth1

第一部分:网卡文件配置

[root@localhost network-scripts]# cat ifcfg-eth0

#-------------------------------------------------------

DEVICE=eth0

TYPE=Ethernet

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=static

IPADDR=120.41.32.101

NETMASK=255.255.255.192

GATEWAY=120.41.32.65

DNS1=8.8.8.8

DNS2=114.114.114.114

#-------------------------------------------------------

[root@localhost network-scripts]# cat ifcfg-eth1

DEVICE=eth1

TYPE=Ethernet

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=static

IPADDR=36.250.79.101

NETMASK=255.255.255.192

#GATEWAY=120.41.32.65

DNS1=8.8.8.8

DNS2=114.114.114.114

第二部分：路由配置

1. 接下来，增加两个路由表，为后续的双网关做点小准备：

# vim /etc/iproute2/rt_tables

101 ChinaNet

102 ChinaCnc

2.手动添加静态路由

ip route flush table ChinaNet

ip route add default via 120.41.32.65 dev eth0 src 120.41.32.101 table ChinaNet

ip route add 127.0.0.0/8 dev lo table ChinaNet

ip rule add from 120.41.32.101 table ChinaNet

ip route flush table ChinaCnc

ip route add default via 36.250.79.65 dev eth1 src 36.250.79.101 table ChinaCnc

ip route add 127.0.0.0/8 dev lo table ChinaCnc

ip rule add from 36.250.79.101 table ChinaCnc

3.加入开机启动

# vim /etc/rc.local

#--------------------------------------------------------------

ip route flush table ChinaNet

ip route add default via 120.41.32.65 dev eth0 src 120.41.32.101 table ChinaNet

ip route add 127.0.0.0/8 dev lo table ChinaNet

ip rule add from 120.41.32.101 table ChinaNet

ip route flush table ChinaCnc

ip route add default via 36.250.79.65 dev eth1 src 36.250.79.101 table ChinaCnc

ip route add 127.0.0.0/8 dev lo table ChinaCnc

ip rule add from 36.250.79.101 table ChinaCnc

#--------------------------------------------------------------