【Linux】使用ip link命令设置bond

1、介绍

设置bond的方法有很多种，其中通过命令行ip link设置就是其中一种，只不过这种设置方式不会持久化，当重启服务器或重启网络服务就会失效。

2、设置步骤

【1】创建bonding接口

ip link add bond0 type bond

查看创建的bond接口：

[root@xxx network-scripts]# ip link show bond0
19: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 1e:ce:ba:1e:f5:d3 brd ff:ff:ff:ff:ff:ff

【2】设置bonding模式

ip link set bond0 type bond mode active-backup miimon 100 #设置冗余备份模式，miimon为检测物理链路时间间隔，单位毫秒

查看bond信息：

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

Bonding Mode: fault-tolerance (active-backup) #负载均衡模式
Primary Slave: None
Currently Active Slave: None #当前激活接口，无
MII Status: down
MII Polling Interval (ms): 100  #检测物理链路时间间隔
Up Delay (ms): 0
Down Delay (ms): 0
Peer Notification Delay (ms): 0

【3】添加物理网口到bonding接口

ip link set p112p1 down
ip link set p112p1 master bond0
ip link set p112p2 down
ip link set p112p2 master bond0

查看聚合口信息：

[root@xxx network-scripts]# ip link show p112p1
4: p112p1: <NO-CARRIER,BROADCAST,MULTICAST,SLAVE,UP> mtu 1500 qdisc mq master bond0 state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:0d:48:4e:9f:e5 brd ff:ff:ff:ff:ff:ff
[root@xxx network-scripts]# ip link show p112p2
5: p112p2: <NO-CARRIER,BROADCAST,MULTICAST,SLAVE,UP> mtu 1500 qdisc mq master bond0 state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:0d:48:4e:9f:e5 brd ff:ff:ff:ff:ff:ff

【4】激活bonding接口

ip link set p112p1 up
ip link set p112p2 up
ip link set bond0 up

查看bond信息：

[root@xxx network-scripts]# 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: p112p1  #当前使用接口
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Peer Notification Delay (ms): 0

Slave Interface: p112p1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0d:48:4e:9f:e5
Slave queue ID: 0

Slave Interface: p112p2
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0d:48:4e:9f:e6
Slave queue ID: 0

3、解除步骤

【1】关闭bond接口

ip link set bond0 down

查看bond0接口状态：

[root@xxx ~]# ip link show bond0
11: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:0d:48:4e:9f:e5 brd ff:ff:ff:ff:ff:ff

【2】接触从属接口

ip link set p112p1 nomaster
ip link set p112p2 nomaster

查看从接口状态：

[root@xxx ~]# ip link show p112p1 
4: p112p1: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:0d:48:4e:9f:e5 brd ff:ff:ff:ff:ff:ff
[root@xxx ~]# ip link show p112p2
5: p112p2: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:0d:48:4e:9f:e6 brd ff:ff:ff:ff:ff:ff

查看bond信息：

[root@xxx ~]# 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: None
MII Status: down
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Peer Notification Delay (ms): 0

【3】删除bond接口

ip link del bond0 type bond

查看bond信息，不存在：

[root@xxx ~]# cat /proc/net/bonding/bond0
cat: /proc/net/bonding/bond0: No such file or directory