redhat5双网卡绑定(主备).doc

1.新建/etc/sysconfig/network-scripts/ifcfg-bond0文件DEVICE=bond0IPADDR=x.x.x.xNETMASK=255.255.255.0GATEWAY=x.x.x.xONBOOT=yesTYPE=EthernetUSERCTL=noBOOTPROTO=none2.更改/etc/sysconfig/network-scripts/ifcfg-eth0属性DEVICE=eth0MASTER=bond0SLAVE=yesONBOOT=yesBOOTPROTO=noneUSERCTL=no3.更改/etc/sysconfig/network-scripts/ifcfg-eth1网卡的属性DEVICE=eth1MASTER=bond0SLAVE=yesONBOOT=yesBOOTPROTO=noneUSERCTL=no4.编辑/etc/modprobe.conf文件,最后面加入以下内容alias bond0 bondingoptions bond0 miimon=100 mode=1-mode的值表示工作模式，他共有0，1,2,3四种模式，常用的为0,1两种。 mode=0表示load balancing (round-robin)为负载均衡方式，两块网卡都工作。 mode=1表示fault-tolerance (active-backup)提供冗余功能，工作方式是主备的工作方式,也就是说默认情况下只有一块网卡工作,另一块做备份。linux中冗余功能的模式为 mode=35.在 /etc/rc.d/rc.local 中加入以下命令ifenslave bond0 eth0 eth1 -此时系统才是主备方式系统进行网卡重启或者是重启系统即可。重启系统之后，在命令行中输入ifconfig 此时eth0和eth1对应的mac地址应该是一致的。如下：如出现了如下的有多余的接口，如：peth0接口 ，对应的 HWaddr FE:FF:FF:FF:FF:FF 等等，这类接口是在系统中多开了服务。libvirtd ,xend 这些服务是liunx针对网桥的一些服务，如在liunx系统中增加了虚拟机就会导致下面的结果。rootlocalhost # ifconfigeth0 Link encap:EthernetHWaddr 00:E0:4C:40:49:79 inet addr:192.168.12.16Bcast:192.168.12.255Mask:255.255.255.0 inet6 addr: fe80:2e0:4cff:fe40:4979/64 Scope:Link UP BROADCAST RUNNING MULTICASTMTU:1500Metric:1 RX packets:1595 errors:0 dropped:0 overruns:0 frame:0 TX packets:264 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:165962 (162.0 KiB)TX bytes:37643 (36.7 KiB)lo Link encap:Local Loopback inet addr:127.0.0.1Mask:255.0.0.0 inet6 addr: :1/128 Scope:Host UP LOOPBACK RUNNINGMTU:16436Metric:1 RX packets:2919 errors:0 dropped:0 overruns:0 frame:0 TX packets:2919 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:4226556 (4.0 MiB)TX bytes:4226556 (4.0 MiB)peth0 Link encap:EthernetHWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80:fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARPMTU:1500Metric:1 RX packets:2470 errors:0 dropped:0 overruns:0 frame:0 TX packets:342 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:219605 (214.4 KiB)TX bytes:52273 (51.0 KiB) Interrupt:5 Base address:0x8c00vif0.0 Link encap:EthernetHWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80:fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARPMTU:1500Metric:1 RX packets:291 errors:0 dropped:0 overruns:0 frame:0 TX packets:1610 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:41737 (40.7 KiB)TX bytes:166862 (162.9 KiB)virbr0 Link encap:EthernetHWaddr 00:00:00:00:00:00 inet addr:192.168.122.1Bcast:192.168.122.255Mask:255.255.255.0 inet6 addr: fe80:200:ff:fe00:0/64 Scope:Link UP BROADCAST RUNNING MULTICASTMTU:1500Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:44 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b)TX bytes:10160 (9.9 KiB)xenbr0 Link encap:EthernetHWaddr FE:FF:FF:FF:FF:FF UP BROADCAST RUNNING NOARPMTU:1500Metric:1 RX packets:1375 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:125483 (122.5 KiB)TX bytes:0 (0.0 b)解决办法：在liunx中关掉这样的服务。即把libvirtd 和 xend 这两个服务关掉并且禁止系统启动时开启服务。在系统中输入rootlocalhost #/ etc/init.d/libvirtd stoprootlocalhost #/etc/init.d/xend stoprootloc