網卡綁定可以將多塊網卡虛擬成一塊網卡,聚合起來工作。網卡綁定需要網卡工作在混雜promisc模
式,並且需要將兩塊網卡的mac地址改成相同。
1,配置bond0
# vi ifcfg-bond0
DEVICE=bond0
TYPE=Ethernet
ONBOOT=yes
DELAY=0
BOOTPROTO=static
IPADDR=192.168.1.20
NETMASK=255.255.255.0
2,配置網卡加入bond0
# vi ifcfg-eth1
DEVICE=eth1
BOOTPROTO=none
ONBOOT=yes
USERCTL=no
MASTER=bond0
SLAVE=yes
# vi ifcfg-eth2
DEVICE=eth2
BOOTPROTO=none
ONBOOT=yes
USERCTL=no
MASTER=bond0
SLAVE=yes
# vi ifcfg-eth3
DEVICE=eth3
BOOTPROTO=none
ONBOOT=yes
USERCTL=no
MASTER=bond0
SLAVE=yes
3,在/etc/modules.conf文件中添加如下內容(如果沒有該文件,則新建一個):
alias bond0 bonding
options bond0 miimon=100 mode=0 primary=eth1
其中miimon=100表示每100ms檢查一次鏈路連接狀態,如果不通則會切換物理網卡
mode=1表示主備模式,也就是隻有一塊網卡是active的,只提供失效保護。如果mode=0則是負載均
衡模式的,所有的網卡都是active,還有其他一些模式很少用到
primary=eth1表示主備模式下eth1爲默認的active網卡
4,最後,在/etc/rc.local中加入
modprobe bonding miimon=100 mode=1
重起系統即可生效
5,也可直接執行
#modprobe bonding miimon=100 mode=1
之後
# ifconfig
bond0 Link encap:Ethernet HWaddr 84:2B:2B:15:4D:BA
inet addr:192.168.1.20 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST MASTER MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
eth1 Link encap:Ethernet HWaddr 84:2B:2B:15:4D:BA
UP BROADCAST SLAVE MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:114 Memory:d8000000-d8012800
eth2 Link encap:Ethernet HWaddr 84:2B:2B:15:4D:BA
UP BROADCAST SLAVE MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:122 Memory:da000000-da012800
eth3 Link encap:Ethernet HWaddr 84:2B:2B:15:4D:BA
UP BROADCAST SLAVE MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:130 Memory:dc000000-dc012800
6,加bond0到橋
虛擬化環境中經常需要把網卡加到網橋上
# vi ifcfg-virbr1
DEVICE=virbr1
TYPE=Bridge
ONBOOT=yes
DELAY=0
BOOTPROTO=static
IPADDR=192.168.1.20
NETMASK=255.255.255.0
# vi /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
ONBOOT=yes
BRIDGE=virbr1