Linux双网卡绑定

1、Redhat 双网卡绑定1. 检查 kernel 看是否支持绑定rootNms # cat /boot/config-2.6.18-164.el5 | grep -i bondingCO-NFIG_BONDING=m 表示支持，否则需要编译内核使它支持 bonding2. 将 eth0 和 eth2 两块网卡绑定在一起。1. 建立网卡绑定的配置文件内容如下：rootNms # cat /etc/sysconfig/network-scripts/ifcfg-bond0DEVICE=bond0 绑定设备名称 BONDING_OPTS=mode=1 miimon=100mode 为 0 是绑定的两

2、块网卡负载均衡模式实现，两块网卡同时工作一块网卡宕掉， 另一个继续工作。查阅相关文献有少量丢包现象。Mode 为 1 是绑定的两块网卡以主备模式实现，只有一块网卡工作，当主网卡 宕掉之后，备用网卡立刻接管。Mode 为 0、 2、3、4 需要交换机做相应配置， mode 为 1、5、6 不需交换机特别配置 BOOTPROTO=noneONBOOT=yesNETWORK=10.10.13.0NETMASK=255.255.255.192IPADDR=10.10.13.27USERCTL=yes 允许非 root 用户控制设备GATEWAY=10.10.13.48TYPE=EthernetIPV6

3、INIT=no2. 分别在两块网卡的配置文件添加字段见红色部分Eth0 ： rootNms # cat /etc/sysconfig/network-scripts/ifcfg-eth0# NetXen Incorporated NX3031 Multifunction 1/10-Gigabit Server AdapterDEVICE=eth0BOOTPROTO=noneONBOOT=yesMASTER=bo ndOSLAVE=yesUSERCTL=noTYPE=EthernetIPV6INIT= noEth2 : rootNms # cat 尼tc/sysconfig/network-sc

4、ripts/ifcfg-eth2# NetXe n In corporated NX3031 Multifu nction 1/10-Gigabit Server AdapterDEVICE=eth2BOOTPROTO=noneONBOOT=yesTYPE=EthernetMASTER=bo ndOSLAVE=yesUSERCTL=noIPV6INIT= no3 添加 alias bond。bondingrootNms # cat /etc/modules.c onfalias bondO bonding4 .重启网络服务：尼tc/init.d/network restart或者 servic

5、e network restart5 .检查网卡绑定情况.rootNms # ifconfig bon dO Li nk en cap:EthernetHWaddr 3C:4A:92:E4:AC:14inet addr:10.10.13.27 Bcast:10.10.13.63 Mask:255.255.255.192 in et6addr: fe80:3e4a:92ff:fee4:ac14/64 Scope:Li nkUP BROADCAST RUNNING MASTER MULTICAST MTU:1500 MetricRX packets:1013027 errors:。dropped:

6、。overru ns:0 frame:。TX packets:577741 errors:0 dropped:0 overr un s:0 carrier:。collisi on s:0 txqueuele n:0RX bytes:165151585 (157.5 MiB) TX bytes:96743546 (92.2 MiB)eth0Li nk en cap:EthernetHWaddr 3C:4A:92:E4:AC:14UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1RX packets:1007793 errors:0 dro

7、pped:0 overru ns:0 frame:0TX packets:577743 errors:0 dropped:0 overr un s:0 carrier:0collisi on s:0 txqueuele n:1000RX bytes:164837761 (157.2 MiB) TX bytes:96744064 (92.2 MiB)In terrupt:178ethlLi nk en cap:EthernetHWaddr 3C:4A:92:E4:AC:15UP BROADCAST MULTICAST MTU:1500 Metric:1RX packets:0 errors:0

8、dropped:0 overr un s:0 frame:0TX packets:0 errors:0 dropped:0 overr un s:0 carrier:0collisi on s:0 txqueuele n:1000RX bytes:。(0.0 b) TX bytes:。(0.0 b)In terrupt:186eth2Li nk en cap:EthernetHWaddr 3C:4A:92:E4:AC:14UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1RX packets:5234 errors:0 dropped:

9、0 overr un s:0 frame:0TX packets:0 errors:0 dropped:0 overr un s:0 carrier:0collisi on s:0 txqueuele n:1。RX bytes:313824 (306.4 KiB) TX bytes:0 (0.0 b)In terrupt:194eth3Li nk en cap:EthernetHWaddr 3C:4A:92:E4:AC:17inet addr:192.168.100.13 Bcast:192.168.100.255 Mask:255.255.255.0in et6addr: fe80:3e4a

10、:92ff:fee4:ac17/64 Scope:Li nkUP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1RX packets:5852 errors:。dropped:0 overr un s:0 frame:。TX packets:76 errors:0 dropped:0 overr un s:0 carrier:。collisi on s:0 txqueuele n:1000RX bytes:402095 (392.6 KiB) TX bytes:9661 (9.4 KiB)In terrupt:202lo Link en cap:Lo

11、cal Loopbackinet addr:127.0.0.1 Mask:255.0.0.0in et6addr: :1/128 Scope:HostUP LOOPBACK RUNNING MTU:16436 Metric:1RX packets:7300 errors:0 dropped:0 overr un s:0 frame:0TX packets:7300 errors:0 dropped:0 overr un s:0 carrier:0collisi on s:0 txqueuele n:0RX bytes:4411678 (4.2 MiB) TX bytes:4411678 (4.

12、2 MiB)6.查看双网卡现在工作在那块网卡上此次绑定模式为主备绑定( mode=1 )，通过cat /proc/net/b on di ng/bo ndO可以看到绑定现在工作在eth0上，当停止eth0网卡，绑定不受影响，eth2代替eth0说明绑定 成功。详见下面：rootlocalhost # cat /proc/ net/bondin g/b ondOEthernet Cha nnel Bonding Driver: v3.4.0 (October 7, 2008)Bonding Mode: fault-tolera nee (active-backup)Primary Slave:

13、NoneCurren tly Active Slave: ethObond工作在ethO网卡上Mil Status: upMil Polling Interval (ms): 100Up Delay (ms): 0Dow n Delay (ms): 0Slave In terface: ethOethO启动正常MII Status: upLink Failure Count: 3Permanent HW addr: 00:08:02:ed:6e:4fSlave In terface: eth2eth2 启动正常MII Status: upLink Failure Count: 1Perma n

14、ent HW addr: 00:02:a5:44:e0:41rootlocalhost # ifconfig eth0 down 停掉 eth0 网卡rootlocalhost # cat /proc/ net/b ondin g/b ondOEthernet Cha nnel Bonding Driver: v3.4.0 (October 7, 2008)Bonding Mode: fault-tolera nee (active-backup)Primary Slave: NoneCurrently Active Slave: eth2eth2 代替 ethO 工作MII Status:

15、upMII Polling Interval (ms): 100Up Delay (ms): 0Dow n Delay (ms): 0Slave In terface: eth0etho网卡停止工作MII Status: dow nLink Failure Count: 4Perma nent HW addr: 00:08:02:ed:6e:4fSlave In terface: eth2Mil Status: upLink Failure Count: 1Permanent HW addr: 00:02:a5:44:e0:41rootlocalhost # ifconfig eth0 up7.查看有没有丢包:rootNms # netstat -iKernel In terface tableIface MTUMet RX-OK RX-ERR R