linux服务器双网卡绑定

Posted 2020-10-03

Linux双网卡绑定

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双网卡绑定在项目应用中较多，通常配置上网卡绑定有两种方法，第一种是采用传统方法修改配置文件，第二种是采用新的命令直接生成配置文件。

传统配置方法步骤如下：

第一步：编辑网卡eth1配置文件

第二步：复制网卡eth1配置文件，重命名为eth2

第三步：复制网卡eth1配置文件，重命名为bond0，并设置双网卡绑定的相关选项如：双网卡之间检测周期100ms，双网卡之间的模式模式1 为主被模式，模式0为双主模式，如BONDING_OPTS="miimon=100 mode=0"

第四步：重启网络服务

如下实例 ：

[[email protected]  /etc/sysconfig/network-scripts]#vim ifcfg-eth1 1 DEVICE=eth1                                                             #编辑配置文件eth1   2 BOOTPROTO=none   3 MASTER=bond0   4 SLAVE=yes   5 USERCTL=no                                                              #是否允许普通用户管理此端口 [[email protected]  /etc/sysconfig/network-scripts]#cp ifcfg-eth1 ifcfg-eth2 cp: overwrite  ‘ifcfg-eth2’? y                                            #复制配置文件 [[email protected]  /etc/sysconfig/network-scripts]#vim ifcfg-eth2 1 DEVICE=eth2                                                             #修改DEVICE=eth2   2  BOOTPROTO=none   3 MASTER=bond0   4 SLAVE=yes   5 USERCTL=no [[email protected]  /etc/sysconfig/network-scripts]#cp ifcfg-eth1 ifcfg-bond0 [[email protected]  /etc/sysconfig/network-scripts]#vim ifcfg-bond0 1 DEVICE=bond0   2 BOOTPROTO=none   3 BONDING_OPTS="miimon=100 mode=0"   4 IPADDR=192.168.10.100   5 PREFIX=24   6 GATEWAY=192.168.10.254   7 DNS1=114.114.114.114   8 DNS2=8.8.8.8 [[email protected]  ~]#systemctl restart network                                 #重启网络服务 [[email protected]  ~]#cat /proc/net/bonding/bond0 Ethernet Channel  Bonding Driver: v3.7.1 (April 27, 2011)   Bonding Mode: load  balancing (round-robin) MII Status: up MII Polling  Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface:  eth1 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure  Count: 0 Permanent HW addr:  00:0c:29:cf:ed:5f Slave queue ID: 0   Slave Interface:  eth2 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure  Count: 0 Permanent HW addr:  00:0c:29:cf:ed:69 Slave queue ID: 0

脚本中通常采用nmcli命令实现上网卡绑定，如若通过配置文件进行双网卡绑定较为复杂，具体命令步骤如下（在nmcli命令中con-name代表生成配置文件的名的名称，ifname是DEVICE的名称）：

第一步：创建bond0

nmcli con add type bondcon-name bond0 ifname bond0 mode 1 miimon 100

第二步：加载slave成员

nmcli con add typebond-slave ifname eth1 master bond0

nmcli con add typebond-slave ifname eth1 master bond0

第三步：启动bond-slave-eth1和2成员，以及bond0成员

nmcliconnection up "bond-slave-eth1"

nmcliconnection up "bond-slave-eth1"

nmcliconnection up "bond0"

如若删除bond0

第四步：让bond0先down

nmcli connectiondown bond0

第五步：删除配置文件

nmcli connection deletebond0

nmcli connectiondelete bond-slave-eth1

nmcli connectiondelete bond-slave-eth2

具体实例演示：

[[email protected] ~]#nmcli con  add type bond con-name bond0 ifname bond0 mode 1 miimon 100 [[email protected] ~]#nmcli con add type bond-slave ifname eth1 master bond0 [[email protected] ~]#nmcli con add type bond-slave ifname eth2 master bond0 [[email protected] ~]#nmcli connection show   #发现bond-slave-eth1和2并无启动 NAME             UUID                                  TYPE            DEVICE bond-slave-eth1   aa3662d9-0382-4640-ab56-fb40d8da41de   802-3-ethernet  --      bond0             882245a8-c2f8-4fbd-9fbe-69769367bc43   bond            bond0  eth2              9b2cd717-a336-4739-9a0c-c93ba560daee   802-3-ethernet  eth2   eth1              32ccd8a8-a6fb-4516-94da-48d394c338d8   802-3-ethernet  eth1   eth0              90e23a1d-6f6e-461d-b2a3-15eab49cf43b   802-3-ethernet  eth0   vlan-VLAN10      4dc6d0e3-154c-0cff-3dd4-adef4ad932f1  vlan            --     bond-slave-eth2   c06c8a6e-7ea9-410b-a5f0-dd2337bbd0ba   802-3-ethernet  --  [[email protected] ~]#nmcli connection up "bond-slave-eth1"  #启动bond-slave-eth1 Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/29) [[email protected] ~]#nmcli connection up "bond-slave-eth2"  #启动bond-slave-eth2 Connection successfully activated (D-Bus active path:  /org/freedesktop/NetworkManager/ActiveConnection/30) [[email protected] ~]#nmcli connection show            #查看验证发现所有端口正常 NAME             UUID                                  TYPE            DEVICE bond-slave-eth1   aa3662d9-0382-4640-ab56-fb40d8da41de   802-3-ethernet  eth1   bond0             882245a8-c2f8-4fbd-9fbe-69769367bc43   bond            bond0  eth2             9b2cd717-a336-4739-9a0c-c93ba560daee  802-3-ethernet  --       eth1              32ccd8a8-a6fb-4516-94da-48d394c338d8   802-3-ethernet  --     eth0              90e23a1d-6f6e-461d-b2a3-15eab49cf43b   802-3-ethernet  eth0   vlan-VLAN10       4dc6d0e3-154c-0cff-3dd4-adef4ad932f1   vlan            --     bond-slave-eth2   c06c8a6e-7ea9-410b-a5f0-dd2337bbd0ba   802-3-ethernet  eth2 [[email protected] ~]# ip a 13: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc  noqueue state UP                                      #无需重启网络服务，已经自动获取IP地址     link/ether 00:0c:29:cf:ed:5f  brd ff:ff:ff:ff:ff:ff     inet 172.18.250.48/16  brd 172.18.255.255 scope global dynamic bond0        valid_lft 85630sec  preferred_lft 85630sec     inet6  fe80::20c:29ff:fecf:ed5f/64 scope link        valid_lft forever  preferred_lft forever [[email protected] ~]#cat /proc/net/bonding/bond0  #查看内存运行状态 Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)   Bonding Mode: fault-tolerance (active-backup) Primary Slave: None Currently Active Slave: eth1 MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0   Slave Interface: eth1 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 00:0c:29:cf:ed:5f Slave queue ID: 0   Slave Interface: eth2 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 00:0c:29:cf:ed:69 Slave queue ID: 0

    如若想参考纯正版的资料可到官网：

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/sec-Configure_802_1Q_VLAN_Tagging_Using_the_Command_Line.html

或Linux系统本身的man文档：

cat  /usr/share/doc/kernel-doc-version/Documentation/networking/bonding.txt

https://www.kernel.org/doc/Documentation/networking/bonding.txt

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