Linux 下 网卡绑定ip

一、多网卡绑定1个ip

1. 新建ifcfg-bond0

[root@dex network-scripts]# cd /etc/sysconfig/network-scripts/
[root@dex network-scripts]# cp ifcfg-eth0 ifcfg-bond0
[root@dex network-scripts]# vi ifcfg-bond0
加入如下内容
# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)
DEVICE=bond0
BOOTPROTO=none
BROADCAST=192.168.100.255
IPADDR=192.168.100.12
NETMASK=255.255.255.0
NETWORK=192.168.100.0
ONBOOT=yes
2. 修改ifcfg-eth0 ifcfg-eth1
[root@dex network-scripts]# vi ifcfg-eth0
修改为如下内容
# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)
DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
MASTER=bond0
SLAVE=yes
[root@dex network-scripts]# cp ifcfg-eth0 ifcfg-eth1
[root@dex network-scripts]# vi ifcfg-eth1
修改为如下内容
# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)
DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
MASTER=bond0
SLAVE=yes
3. 修改/etc/modprobe.conf文件
[root@dex network-scripts]# vi /etc/modprobe.conf
加入如下两行
alias bond0 bonding
options bond0 miimon=100 mode=1




mode=0 表示两块网卡同时工作，提供负载均衡
mode=1 表示提供冗余功能（主备模式）


4. 重启服务
[root@dex network-scripts]# service network restart
查看一下
[root@dex network-scripts]# ifconfig -a
bond0 Link encap:Ethernet HWaddr 00:0C:29:AE:CF:7F
inet addr:192.168.100.12 Bcast:192.168.100.255 Mask:255.255.255.0
UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
RX packets:3396 errors:0 dropped:0 overruns:0 frame:0
TX packets:753 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:237786 (232.2 KiB) TX bytes:86115 (84.0 KiB)


eth0 Link encap:Ethernet HWaddr 00:0C:29:AE:CF:7F
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:1201 errors:0 dropped:0 overruns:0 frame:0
TX packets:694 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:76776 (74.9 KiB) TX bytes:79243 (77.3 KiB)


eth1 Link encap:Ethernet HWaddr 00:0C:29:AE:CF:7F
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:2195 errors:0 dropped:0 overruns:0 frame:0
TX packets:59 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:161010 (157.2 KiB) TX bytes:6872 (6.7 KiB)


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:2045 errors:0 dropped:0 overruns:0 frame:0
TX packets:2045 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3201608 (3.0 MiB) TX bytes:3201608 (3.0 MiB)
绑定结束

尝试着拔掉一个网线，看看结果怎样。

VM中只能做mode=1

二、单网卡绑定多个ip

这一步很简单，只要添加一个配置文件即可

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

[root@james-test network-scripts]# cp ifcfg-eth0 ifcfg-eth0:3

[root@james-test network-scripts]# vi ifcfg-eth0:3

# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)
DEVICE=eth0:3
BOOTPROTO=static
BROADCAST=192.168.100.255
HWADDR=00:0C:29:90:B5:80
IPADDR=192.168.100.7
IPV6INIT=yes
IPV6_AUTOCONF=yes
NETMASK=255.255.255.0
NETWORK=192.168.100.0
ONBOOT=yes

[root@james-test network-scripts]# service network restart
Shutting down interface eth0: [ OK ]
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
Bringing up interface eth0: [ OK ]

[root@james-test network-scripts]# ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:0C:29:90:B5:80
inet addr:192.168.100.1 Bcast:192.168.100.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4080254 errors:0 dropped:0 overruns:0 frame:0
TX packets:2391945 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:604068660 (576.0 MiB) TX bytes:3276087314 (3.0 GiB)
eth0:1 Link encap:Ethernet HWaddr 00:0C:29:90:B5:80
inet addr:192.168.100.8 Bcast:192.168.100.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
eth0:3 Link encap:Ethernet HWaddr 00:0C:29:90:B5:80
inet addr:192.168.100.7 Bcast:192.168.100.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
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:1357158 errors:0 dropped:0 overruns:0 frame:0
TX packets:1357158 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:126429892 (120.5 MiB) TX bytes:126429892 (120.5 MiB)

或者直接使用ifconfig命令也可以

[root@james-test network-scripts]# ifconfig eth0:2 192.168.100.9
[root@james-test network-scripts]# ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:0C:29:90:B5:80
inet addr:192.168.100.1 Bcast:192.168.100.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4080397 errors:0 dropped:0 overruns:0 frame:0
TX packets:2392060 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:604083446 (576.0 MiB) TX bytes:3276102542 (3.0 GiB)
eth0:1 Link encap:Ethernet HWaddr 00:0C:29:90:B5:80
inet addr:192.168.100.8 Bcast:192.168.100.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
eth0:2 Link encap:Ethernet HWaddr 00:0C:29:90:B5:80
inet addr:192.168.100.9 Bcast:192.168.100.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
eth0:3 Link encap:Ethernet HWaddr 00:0C:29:90:B5:80
inet addr:192.168.100.7 Bcast:192.168.100.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
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:1357194 errors:0 dropped:0 overruns:0 frame:0
TX packets:1357194 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:126433632 (120.5 MiB) TX bytes:126433632 (120.5 MiB)