centos设置双网卡绑定band0

1、执行setup命令-->网络配置-->本例中四块网卡。

2、ifconfig列出四块网卡。

3、我们的目标，绑定eth0和eth1两块网卡作为公网网卡，ip设置为192.168.0.51

4、首先备份两块网卡的配置文件

Mv/etc/sysconfig/network-scripts/ifcfg-eth0/etc/sysconfig/bak_network-scripts/ifcfg-eth0_bak

Mv /etc/sysconfig/network-scripts/ifcfg-eth1 /etc/sysconfig/bak_network-scripts/ifcfg-eth1_bak

5、重新创建ifcfg-eth0网卡配置文件

vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
USERCTL=no
ONBOOT=yes
SLAVE=yes
MASTER=bond0
BOOTPROTO=none

6、重建eth1网卡配置文件

vi /etc/sysconfig/network-scripts/ifcfg-eth1

DEVICE=eth1
USERCTL=no
ONBOOT=yes
SLAVE=yes
MASTER=bond0
BOOTPROTO=none

7、创建bond0虚拟网卡配置文件

Vi /etc/sysconfig/network-scripts/ifcfg-bond0

DEVICE=bond0
IPADDR=192.168.0.51
NETMASK=255.255.255.0
USERCTL=no
BOOTPROTO=none
ONBOOT=yes
GATEWAY=192.168.0.1
IPV6INIT=no
TYPE=Ethernet
#DNS1=192.168.0.1

8、修改配置文件/etc/modprobe.d/dist.conf

vi dist.conf

最后新增如下两行：

alias bond0 bonding
options bond0 miimon=100 mode=0

mode=0表示做负载均衡

9、加载bond0模块

[root@rac1 modprobe.d]# modprobe bonding
[root@rac1 modprobe.d]# lsmod |grep bond
bonding               127331  0 
8021q                  25317  1 bonding
ipv6                  321422  30 bonding,ip6t_REJECT,nf_conntrack_ipv6,nf_defrag_ipv6

10、重启网络服务

service network stop

11、最好也重启下sshd服务

service sshd restart

12、查看bond0状态：

[root@rac1 network-scripts]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.6.0 (September 26,2009)

Bonding Mode: load balancing (round-robin)
MII Status: up
MII Polling Interval (ms): 0
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eth0
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 08:00:27:fc:7e:5b
Slave queue ID: 0

Slave Interface: eth1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 08:00:27:6f:e3:9d
Slave queue ID: 0
[root@rac1 network-scripts]#

13、查看ifconfig

[root@rac1 network-scripts]# ifconfig
bond0     Link encap:Ethernet  HWaddr 08:00:27:FC:7E:5B  
          inet addr:192.168.0.51  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::a00:27ff:fefc:7e5b/64 Scope:Link
          UP broADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
          RX packets:4135 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2025 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:375692 (366.8 KiB)  TX bytes:261792 (255.6 KiB)

eth0      Link encap:Ethernet  HWaddr 08:00:27:FC:7E:5B  
          UP broADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
          RX packets:3394 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1640 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:304735 (297.5 KiB)  TX bytes:219122 (213.9 KiB)

eth1      Link encap:Ethernet  HWaddr 08:00:27:FC:7E:5B  
          UP broADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
          RX packets:742 errors:0 dropped:0 overruns:0 frame:0
          TX packets:387 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:71017 (69.3 KiB)  TX bytes:43378 (42.3 KiB)

eth2      Link encap:Ethernet  HWaddr 08:00:27:18:29:48  
          inet addr:192.168.0.7  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::a00:27ff:fe18:2948/64 Scope:Link
          UP broADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:862 errors:0 dropped:0 overruns:0 frame:0
          TX packets:113 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:77480 (75.6 KiB)  TX bytes:12978 (12.6 KiB)

eth3      Link encap:Ethernet  HWaddr 08:00:27:59:1E:79  
          inet addr:192.168.0.99  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::a00:27ff:fe59:1e79/64 Scope:Link
          UP broADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:768 errors:0 dropped:0 overruns:0 frame:0
          TX packets:42 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:73511 (71.7 KiB)  TX bytes:2732 (2.6 KiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:728 (728.0 b)  TX bytes:728 (728.0 b)

[root@rac1 network-scripts]#

注意eth0和eth1是不应该有ip显示的。

14、ok

原文地址：https://www.jb51.cc/centos/375593.html

centos设置双网卡绑定band0

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