Linux下快速设定ip bond
在计算机网路普及的初期，很多OS系统都使用的为单网卡方式，即一个网卡使用一个IP地址。随着网络要求的不断提高，我们可以对多个网卡进行绑定聚合当一个逻辑网络接口来使用，从而大幅提升服务器的网络吞吐(I/O)，同时也可以根据不同的场景和需求来设置其绑定模式。本文简要描述一下其配置过程。
1. 编辑ifcfg-bond0文件 ###本文演示环境CentOS release 5.11，对eth0以及eth1进行bond # vi /etc/sysconfig/network-scripts/ifcfg-bond0 DEVICE=bond0 BOOTPROTO=static IPADDR=192.168.9.33 NETMASK=255.255.255.0 BROADCAST=192.168.9.255 GATEWAY=192.168.9.250 ONBOOT=yes TYPE=Ethernet
2. 编辑eth0、eth1文件 # vi /etc/sysconfig/network-scripts/ifcfg-eth0 ### Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet DEVICE=eth0 BOOTPROTO=none HWADDR=xx:xx:xx:xx:xx:xx #此处为对应的mac地址 ONBOOT=yes MASTER=bond0 SLAVE=yes
# vi /etc/sysconfig/network-scripts/ifcfg-eth1 ### Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet DEVICE=eth1 BOOTPROTO=none HWADDR=xx:xx:xx:xx:xx:xx ONBOOT=yes HOTPLUG=no MASTER=bond0 SLAVE=yes
3. 编辑modprobe.conf文件 # vi /etc/modprobe.conf 添加： alias bond0 bonding options bond0 miimon=100 mode=0
说明： 1).miimon=100 用来设定链路监测的间隔时间。即每100ms监测一次链路状态。bonding只监测主机与交换机之间链路。如果交换机出去的链路出问题而本身没有问题，那么bonding认为链路没有问题而继续使用。 2).mode=1 表示提供冗余功能。除此之外还可以为0、2、3，共四种模式。0表示负载均衡 3).更详细的可参考：深度分析Linux下双网卡绑定七种模式
4. 重启网络 # service network restart
5. 验证 通过其它机器ping 绑定的ip，ping的过程中拔掉eth0或eth1网线，确认网络是否持续正常
###参考如下的验证为启动bond后的结果 # less /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.4.0-2 (October 7, 2008)
Bonding Mode: load balancing (round-robin) MII Status: up MII Polling Interval (ms): 100 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: 44:a8:42:0b:a7:a5
Slave Interface: eth1 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 44:a8:42:0b:a7:a6
###查看当前主机的IP配置信息 # ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue 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 qlen 1000 link/ether 44:a8:42:0b:a7:a5 brd ff:ff:ff:ff:ff:ff 3: eth1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 qlen 1000 link/ether 44:a8:42:0b:a7:a5 brd ff:ff:ff:ff:ff:ff 4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000 link/ether 44:a8:42:0b:a7:a7 brd ff:ff:ff:ff:ff:ff 5: eth3: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 44:a8:42:0b:a7:a8 brd ff:ff:ff:ff:ff:ff inet 192.168.10.15/24 brd 192.168.10.255 scope global eth3 6: sit0: <NOARP> mtu 1480 qdisc noop link/sit 0.0.0.0 brd 0.0.0.0 7: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue link/ether 44:a8:42:0b:a7:a5 brd ff:ff:ff:ff:ff:ff inet 192.168.9.33/24 brd 192.168.9.255 scope global bond0 inet6 fe80::46a8:42ff:fe0b:a7a5/64 scope link valid_lft forever preferred_lft forever