linux双网卡绑定
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软硬件环境
- centos
前言
bonding的作用是把多块网卡虚拟成一块网卡,使用一个IP地址,一个MAC地址。一般的发行版内核都支持bonding,如果碰到不支持的,重编下内核使其支持就可以了。
实践
cd /etc/sysconfig/network-scriptscp ifcfg-eth0 ifcfg-bond0
编辑ifcfg-bond0
# Broadcom NetXtreme II BCM5708 Gigabit Ethernet DEVICE=bond0 BROADCAST=192.168.0.255 HWADDR=00:22:19:CD:CD:44 IPADDR=192.168.0.251 NETMASK=255.255.255.0 ONBOOT=yes GATEWAY=192.168.0.1 TYPE=Ethernet
ifcfg-eth0配置文件
# Broadcom NetXtreme II BCM5708 Gigabit Ethernet DEVICE=eth0 HWADDR=00:1A:64:64:6C:C8 NETMASK=255.255.255.0 ONBOOT=yes TYPE=Ethernet
ifcfg-eth1配置文件
# Broadcom NetXtreme II BCM5708 Gigabit Ethernet DEVICE=eth1 HWADDR=00:1A:64:64:6C:CA NETMASK=255.255.255.0 ONBOOT=yes TYPE=Ethernet
编辑/etc/modprobe.conf文件
alias bond0 bonding options bond0 miimon=100 mode=1 alias scsi_hostadapter mptbase alias scsi_hostadapter1 mptscsih options lnet networks=tcp0
开机启动编辑/etc/rc.local文件
modprobe bondingifenslave bond0 eth0 eth1
在主备模式下工作,会按照先后顺序提供网卡服务,这里是eth0然后是eth1,如果其中有一块网卡失效,网络也不会中断,这有点像RAID1的功能。一切设置完毕后,重启系统查看配置结果。
ifconfig
bond0 Link encap:Ethernet HWaddr 00:1A:64:64:6C:C8 inet addr:192.168.0.251 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::21a:64ff:fe64:6cc8/64 Scope:Link UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1 RX packets:17066 errors:0 dropped:0 overruns:0 frame:0 TX packets:105 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1118781 (1.0 MiB) TX bytes:21938 (21.4 KiB)eth0 Link encap:Ethernet HWaddr 00:1A:64:64:6C:C8 inet6 addr: fe80::21a:64ff:fe64:6cc8/64 Scope:Link UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1 RX packets:8672 errors:0 dropped:0 overruns:0 frame:0 TX packets:89 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:568833 (555.5 KiB) TX bytes:17518 (17.1 KiB) Interrupt:3 Memory:ce000000-ce012100 eth1 Link encap:Ethernet HWaddr 00:1A:64:64:6C:C8 inet6 addr: fe80::21a:64ff:fe64:6cc8/64 Scope:Link UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1 RX packets:8394 errors:0 dropped:0 overruns:0 frame:0 TX packets:16 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:549948 (537.0 KiB) TX bytes:4420 (4.3 KiB) Interrupt:10 Memory:ca000000-ca012100
从上面的输出可以看到,bond0、eth0、eth1的HWaddr都是00:1A:64:64:6C:C8。
查看bonding的状态
cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.1.2 (January 20, 2007)Bonding Mode: fault-tolerance (active-backup)Primary Slave: NoneCurrently Active Slave: eth0MII Status: upMII Polling Interval (ms): 100Up Delay (ms): 0Down Delay (ms): 0Slave Interface: eth0MII Status: upLink Failure Count: 0Permanent HW addr: 00:1a:64:64:6c:c8Slave Interface: eth1MII Status: upLink Failure Count: 0Permanent HW addr: 00:1a:64:64:6c:ca
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