标签:static tcpdump The driver hellip ann mis 增加 work
Linux双网卡绑定配置
Linux Redhat 6.5、4张网卡
需求
4张网卡两两绑定,4张网卡分别是eth0/eth1/eth2/eth3
其中eth0/eth2绑定(bond0)、eth1/eth3绑定(bond1)
什么是bind?
将多块网卡虚拟成为一块网卡的技术,通过bond技术让多块网卡看起来是一个单独的以太网接口设备并具有相同的ip地址。
双网卡工作原理
网卡工作在混杂(promisc)模式,接收到达网卡的所有数据包,tcpdump工作用的也是混杂模式(promisc),将两块网卡的 MAC地址修改为相同接收特定MAC的数据帧,然后把相应的数据帧传送给bond驱动程序进行处理。
mode=1:在主备模式下,只有主网卡eth0工作,eth1作为备份网卡是不工作的,只有当一个网络接口失效时(例如交换机掉电等),为了不会出现网络中断,系统会按照配置指定的网卡顺序启动工作,保证机器仍能对外服务,起到了失效保护功能。
mode=0:在负载均衡模式下,两块网卡都工作,提供两倍带宽。
[root@rac-node1 ~]# ifconfig -a
[root@rac-node1 ~]# cd /etc/sysconfig/network-scripts/
[root@rac-node1
network-scripts]# ls
[root@rac-node1 network-scripts]# vim ifcfg-eth0
[root@rac-node1 network-scripts]# cat ifcfg-eth0
DEVICE=eth0
HWADDR=00:0C:29:84:D2:EB
TYPE=Ethernet
UUID=b93ebcc4-90bc-4357-85d8-6ccb417fcc57
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=none
none表示不使用任何协议
static表示设置静态IP
dhcp表示动态获取IP
MASTER=bond0 #指定虚拟网口的名字(主人)
SLAVE=yes #备用(从设备)
[root@rac-node1 network-scripts]# vim ifcfg-eth2
[root@rac-node1 network-scripts]# cat ifcfg-eth2
DEVICE=eth2
HWADDR=00:0C:29:84:D2:FF
TYPE=Ethernet
UUID=57cce5b3-23c6-47e7-aca5-86c2358f314f
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=none
none表示不使用任何协议
static表示设置静态IP
dhcp表示动态获取IP
MASTER=bond0 #指定虚拟网口的名字(主人)
SLAVE=yes#备用(从设备)
[root@rac-node1 network-scripts]# touch ifcfg-bond0
[root@rac-node1 network-scripts]# vim ifcfg-bond0
[root@rac-node1 network-scripts]# cat ifcfg-bond0
DEVICE=bond0
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.16.131
NETMASK=255.255.255.0
#GATEWAY=192.168.16.1
[root@rac-node1 network-scripts]# vim /etc/modprobe.d/dist.conf
末尾增加以下两行
alias bond0 bonding
options bond0 miimon=100 mode=1
#miimon是用来进行链路监测的:miimon=100表示系统每100ms监测一次链路连接状态,如果有一条线路不通就转入另一条线路。
#mode=1表示属于主备模式。
在/etc/rc.d/rc.local文件中加入如下语句
[root@rac-node1 network-scripts]# vim /etc/rc.d/rc.local
ifenslave bond0 eth0 eth2 ---系统启动自动运行
#route add -net 192.168.xxx.0 netmask 255.255.255.0 bond0---如果有需要添加该路由
不能重启服务(重启网络服务不能使双网卡绑定生效),只能重启主机。
[root@rac-node1 ~]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth0 #主用网口
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth0
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:84:d2:eb
Slave queue ID: 0
Slave Interface: eth2
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:84:d2:ff
Slave queue ID: 0
… … … … …
剩余两个网口配置方法一致
[root@rac-node1 ~]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth0
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth0
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:84:d2:eb
Slave queue ID: 0
Slave Interface: eth2
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:84:d2:ff
Slave queue ID: 0
[root@rac-node1 ~]# ifdown ifcfg-eth0
[root@rac-node1 ~]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth2
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth2
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:84:d2:ff
Slave queue ID: 0
注意:
①UUID是唯一的编号,每个网口唯一
②两个配置文件中HWADDR不能一样,可以不要,因为会自动读取
③网口切换后 ifconfig bond0查看到的MAC地址还是切换前的MAC地址-->为了防止IP对应MAC地址混乱
标签:static tcpdump The driver hellip ann mis 增加 work
原文地址:https://www.cnblogs.com/qgmzhn/p/12119226.html