欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页

CentOS双网卡配置默认路由

程序员文章站 2024-02-13 19:46:40
...

CentOS使用双网卡时,如果要指定其中一个网卡的网关作为默认路由,不能直接用route命令进行修改,或者只是删除其中一个默认路由。例如:

[[email protected]:0]# ifconfig
eth0        Link encap:Ethernet  HWaddr 00:50:56:A6:4F:9A  
            inet addr:99.1.1.1  Bcast:99.1.16.255  Mask:255.255.255.0
            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
            RX packets:264636824 errors:0 dropped:0 overruns:0 frame:0
            TX packets:1630865 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:1000 
            RX bytes:24486306913 (22.8 GiB)  TX bytes:2105592006 (1.9 GiB)

eth1        Link encap:Ethernet  HWaddr 00:50:56:A6:7E:F4  
            inet addr:192.168.127.8  Bcast:192.168.127.8  Mask:255.255.255.255
            UP BROADCAST MULTICAST  MTU:1500  Metric:1
            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:1000 
            RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

lo          Link encap:Local Loopback  
            inet addr:127.0.0.1  Mask:255.0.0.0
            UP LOOPBACK RUNNING  MTU:16436  Metric:1
            RX packets:132847578 errors:0 dropped:0 overruns:0 frame:0
            TX packets:132847578 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0 
            RX bytes:51965842204 (48.3 GiB)  TX bytes:51965842204 (48.3 GiB)

有99.1.1.1和192.168.127.8两个IP。如果希望默认路由从99.1.1.1的接口出:

cd /etc/sysconfig/network-scripts
echo 'iif eth1 table 1
from 192.168.127.8 table1' > rule-eth1
echo '192.168.127.0/24 dev eth1 table 1
default via 192.168.127.253 dev eth1 table 1' > route-eth1

重启网卡即可。