Linux系统双网卡绑定配置教程

Posted 2023-03-27

参考技术A 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 <> 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:                       [  OK  ]

Bringing up loopback interface:                            [  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)

centos 6.4系统双网卡绑定配置详解

Linux双网卡绑定实现就是使用两块网卡虚拟成为一块网卡(需要交换机支持)，这个聚合起来的设备看起来是一个单独的以太网接口设备，通俗点讲就是两块网卡具有相同的IP地址而并行链接聚合成一个逻辑链路工作。本文详细描述下centos 6.4系统双网卡绑定操作步骤
操作前需要确定NetworkManager 服务是否已经停止，否则容易报错。
#service NetworkManager status
显示NetworkManager 已停即可

 具体绑定操作：
1.在/etc/sysconfig/network-scripts/目录下建立ifcfg-bond0文件，文件内容如下：

DEVICE=bond0   

USERCTL=no

BOOTPROTO=static

ONBOOT=yes

IPADDR=10.0.0.10              ##根据自己需要，填写需要绑定的ip地址掩码网关

NETMASK=255.255.255.0

GATEWAY=10.0.0.1

TYPE=Ethernet

 

2.分别修改ifcfg-em1文件，如下：

DEVICE=em1

ONBOOT=yes

BOOTPROTO=none

MASTER=bond0

SLAVE=yes

USERCTL=no

修改ifcfg-em2文件修改如下：

DEVICE=em2

ONBOOT=yes

BOOTPROTO=none

MASTER=bond0

SLAVE=yes

USERCTL=no

 

3./etc/modprobe.d/目录下建立bonding.conf文件，文件内容如下：

alias bond0 bonding

 

然后重启网络service network restart

4.测试
服务器上开个terminal，ping 网关
拔下一根网线看ping数据，确认没问题之后插上该网线连通之后，再拔下另外一根网线，观察双网卡绑定效果。