CentOS 7.2 bond实现网卡聚合链路(双网卡绑定)脚本及验证(适合云平台)

使用bond实现网卡聚合链路脚本:

#!/bin/bash
#创建一个名为bond0的链路接口
IP=192.168.101.1
GATE=192.168.101.254
ETH1=eno1
ETH2=eno2
ETH3=eno3
ETH4=eno4
modprobe bonding
cat < /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
TYPE=Bond
NAME=bond0
BONDING_MASTER=yes
BOOTPROTO=static
USERCTL=no
ONBOOT=yes
IPADDR=$IP
PREFIX=24
GATEWAY=$GATE
BONDING_OPTS="mode=1 miimon=100"
EOF
cat < /etc/sysconfig/network-scripts/ifcfg-bond1
DEVICE=bond1
TYPE=Bond
NAME=bond1
BONDING_MASTER=yes
USERCTL=no
BOOTPROTO=none
ONBOOT=yes
BONDING_OPTS="mode=1 miimon=100"
EOF
cat < /etc/sysconfig/network-scripts/ifcfg-$ETH1
TYPE=Ethernet
BOOTPROTO=none
DEVICE=$ETH1
ONBOOT=yes
MASTER=bond0
SLAVE=yes
EOF
cat < /etc/sysconfig/network-scripts/ifcfg-$ETH2
TYPE=Ethernet
BOOTPROTO=none
DEVICE=$ETH2
ONBOOT=yes
MASTER=bond0
SLAVE=yes
EOF
cat < /etc/sysconfig/network-scripts/ifcfg-$ETH3
TYPE=Ethernet
BOOTPROTO=none
DEVICE=$ETH3
ONBOOT=yes
MASTER=bond1
SLAVE=yes
EOF
cat < /etc/sysconfig/network-scripts/ifcfg-$ETH4
TYPE=Ethernet
BOOTPROTO=none
DEVICE=$ETH4
ONBOOT=yes
MASTER=bond1
SLAVE=yes
EOF
systemctl restart network
ping $GATE -c 1
reboot

验证：

1.查看bond0状态：

[root@localhost ~]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eno2    #当前主接口
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eno2
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 2c:76:8a:51:d2:09
Slave queue ID: 0

Slave Interface: eno1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 2c:76:8a:51:d2:08
Slave queue ID: 0

2.测试，宕掉当前主接口，看是否切换

[root@localhost ~]# ifdown eno2
Device 'eno2' successfully disconnected.
[root@localhost ~]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eno1    #切换成功
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eno1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 2c:76:8a:51:d2:08
Slave queue ID: 0

详细可参考 红帽官网