linux网络管理 CentOS7使用Bond方式，实现网卡绑定
发布时间：2021-05-20
（1）实验环境
物理网口：eth0,eth1
绑定后虚拟口：bond0
IP地址：192.168.133.23
网关：192.168.133.2
掩码：255.255.255.0
DNS：8.8.8.8
（2）查看并加载bound
[root@localhost ~]＃ modprobe --first-time bonding
[root@localhost ~]＃ lsmod|grep bonding
bonding 132885 0
加载成功后，可以查看到bond0 端口
[root@localhost ~]＃ ip a
1: lo: ＜LOOPBACK,UP,LOWER_UP＞ mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: ＜BROADCAST,MULTICAST,UP,LOWER_UP＞ mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:94:b5:29 brd ff:ff:ff:ff:ff:ff
inet 192.168.133.23/24 brd 192.168.133.255 scope global eth0
inet6 fe80::20c:29ff:fe94:b529/64 scope link
valid_lft forever preferred_lft forever
3: eth1: ＜BROADCAST,MULTICAST＞ mtu 1500 qdisc noop state DOWN qlen 1000
link/ether 00:0c:29:94:b5:33 brd ff:ff:ff:ff:ff:ff
4: bond0: ＜BROADCAST,MULTICAST,MASTER＞ mtu 1500 qdisc noop state DOWN
link/ether 66:51:2f:37:a2:31 brd ff:ff:ff:ff:ff:ff
（3）配置虚拟端口bound0
在/etc/sysconfig/network-scripts/目录下，创建ifcfg-bond0文件
vim /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.133.23
NETMASK=255.255.255.0
GATEWAY=192.168.133.2
DNS1=8.8.8.8
（4）配置物理网卡eth0,eth1
vim /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=none
MASTER=bond0
SLAVE=yes
vim /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
BOOTPROTO=none
MASTER=bond0
SLAVE=yes
（5）修改modprobe相关设定文件
vim /etc/modprobe.d/bonding.conf
alias bond0 binding
options bond0 miimon=100 mode=0 //模式0，miimon是用来进行链路监测的,后面指定的是检查的间隔时间，单位是ms
（6）重启并测试
[root@localhost network-scripts]＃ ip a
1: lo: ＜LOOPBACK,UP,LOWER_UP＞ mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: ＜BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP＞ mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000
link/ether 00:0c:29:94:b5:29 brd ff:ff:ff:ff:ff:ff
3: eth1: ＜BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP＞ mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000
link/ether 00:0c:29:94:b5:29 brd ff:ff:ff:ff:ff:ff
4: bond0: ＜BROADCAST,MULTICAST,MASTER,UP,LOWER_UP＞ mtu 1500 qdisc noqueue state UP
link/ether 00:0c:29:94:b5:29 brd ff:ff:ff:ff:ff:ff
inet 192.168.133.23/24 brd 192.168.133.255 scope global bond0
inet6 fe80::20c:29ff:fe94:b529/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
查看bonud工作状况：
[root@localhost bonding]＃ cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 （April 27, 2011）
Bonding Mode: load balancing （round-robin）
MII Status: up
MII Polling Interval （ms）: 200
Up Delay （ms）: 0
Down Delay （ms）: 0
Slave Interface: eth0
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 1
Permanent HW addr: 00:0c:29:94:b5:29
Slave queue ID: 0
Slave Interface: eth1
MII Status: down
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 1
Permanent HW addr: 00:0c:29:94:b5:33
Slave queue ID: 0
