Linux系统双网卡绑定配置教程

系统版本

[root@ ~]# cat /etc/redhat-release

CentOS release 6.8 (Final)

[root@ ~]# uname -r

2.6.32-642.6.1.el6.x86_64

网卡说明

eth0   192.168.1.8（服务器外网卡）

eth1   服务器网卡(内网)

eth2   服务器网卡(内网)

[root@ ~]# /etc/init.d/iptables stop

[root@ ~]#  chkconfig iptables off

关闭selinux

[root@ ~]#setenforce 0

[root@ ~]#sed -i ‘s/SELINUX=enforcing/SELINUX=disabled/‘ /etc/selinux/config

禁用NetworkManager

[root@ ~]# /etc/init.d/NetworkManager stop

Stopping NetworkManager daemon:           [  OK  ]

[root@ ~]# chkconfig NetworkManager off

[root@ ~]# /etc/init.d/network restart

双网卡绑定配置过程

[root@ ~]# cd /etc/sysconfig/network-scripts/

编辑eth1网卡

[root@ network-scripts]# cat >ifcfg-eth1 <>DEVICE=eth1

>ONBOOT=yes

>BOOTPROTO=none

>USERCTL=no

>MASTER=bind0

>EOF

编辑eth2网卡

[root@ network-scripts]# cat >ifcfg-eth2

ONBOOT=yes

BOOTPROTO=none

USERCTL=no

MASTER=bind0

EOF

编辑bind0网卡

[root@ network-scripts]# cat >ifcfg-bind0 <>DEVICE=bind0

>TYPE=Ethernet

>ONBOOT=yes

>BOOTPROTO=none

>IPADDR=10.0.0.8

>NETMASK=255.255.255.0

>GATEWAY=10.0.0.254

>IPV6INIT=no

>USERCTL=no

>EOF

配置bond参数

[root@ network-scripts]# cat >/etc/modprobe.conf <>信大 alias bind0 bonding

>options bind0 miimon=100 mode=6

>EOF

加入开机自启动(/etc/rc.local)

[root@ network-scripts]# cat >>/etc/rc.local <>ifenslave bind0 eth1 eth2

>EOF

重启网络服务

[root@LVS-2 network-scripts]# service network restart

Shutting down interface eth0:                              [  OK  ]

Shutting down interface eth1:                              [  OK  ]

Shutting down interface eth2:                              [  OK  ]

Shutting down loopback interface:    闷侍                   [  OK  ]

Bringing up loopback interface:         蚂坦吵                   [  OK  ]

Bringing up interface bind0:  WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/.

WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/.

Determining if ip address 10.0.0.8 is already in use for device bind0..[  OK  ]

Bringing up interface eth0:  Determining if ip address 192.168.1.8 is already in use for device eth0...                                                     [  OK  ]

Bringing up interface eth1:  RTNETLINK answers: File exists         [  OK  ]

Bringing up interface eth2:  RTNETLINK answers: File exists          [  OK  ]

配置使绑定立即生效

[root@LVS-2 network-scripts]# ifenslave bind0 eth1 eth2

测试联通

[root@LVS-2 network-scripts]# ping 10.0.0.8

PING 10.0.0.8 (10.0.0.8) 56(84) bytes of data.

64 bytes from 10.0.0.8: icmp_seq=1 ttl=64 time=0.089 ms

64 bytes from 10.0.0.8: icmp_seq=2 ttl=64 time=0.046 ms

^C

--- 10.0.0.8 ping statistics ---

2 packets transmitted, 2 received, 0% packet loss, time 1921ms

rtt min/avg/max/mdev = 0.046/0.067/0.089/0.023 ms

此时会发现系统多一个网卡

[root@LVS-2 network-scripts]# ifconfig bind0

bind0

Link encap:Ethernet  HWaddr 00:0C:29:CC:9B:5

inet addr:10.0.0.8  Bcast:10.0.0.255  Mask:255.255.255.0

inet6 addr: fe80::20c:29ff:fecc:9b55/64 Scope:LinkUP BROADCAST RUNNING MASTER MULTICAST  MTU:1500 Metric:1

RX packets:151 errors:0 dropped:0 overruns:0 frame:0

TX packets:3 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:11826 (11.5 KiB)  TX bytes:258 (258.0 b)

因为运族凯一个系统只允许一个默认网关，所以你的双网卡配置文件，只有一个进行配置，另一个注释掉，以软路由的方旁唤式实现双网卡网络通信正常。 *** 作如下：1、内网卡的IP配置文件正常配置；2、外网卡的IP配置文件网关位置去掉；3、启动2个网穗孝卡；4、执行路由命令添加软路由显示外网只允许指定网段通信使用外网，命令如下：routeadd-net网段netmask掩码gw外网网关以上请使用对应IP替换网段，掩码，外网网关

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