文档课题：Linux 7实现多网卡绑定—bond0方式.

系    统：centos 7.9 64位

环境介绍：vmware虚拟机+网卡为NAT模式.

说    明：此次演示bond0，bond地址192.168.133.120

1、添加网卡

添加2块网卡，加上此前网卡共3块网卡.

2、关闭networkmanager

--关闭networkmanager服务.

[root@liujun ~]# systemctl disable --now NetworkManager

Removed symlink /etc/systemd/system/multi-user.target.wants/NetworkManager.service.

Removed symlink /etc/systemd/system/dbus-org.freedesktop.nm-dispatcher.service.

Removed symlink /etc/systemd/system/network-online.target.wants/NetworkManager-wait-online.service.

说明：now表示立即关闭NetworkManager服务.

3、网卡配置文件

--修改网卡配置文件，注意网卡名需结合实际情况进行配置.

3.1、网卡原数据

[root@liujun ~]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

       valid_lft forever preferred_lft forever

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

    link/ether 00:0c:29:98:c5:5f brd ff:ff:ff:ff:ff:ff

    inet 192.168.133.218/24 brd 192.168.133.255 scope global noprefixroute dynamic ens33

       valid_lft 1038sec preferred_lft 1038sec

    inet6 fe80::e107:1ed3:d4e5:f7ab/64 scope link noprefixroute

       valid_lft forever preferred_lft forever

3: ens37: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

    link/ether 00:0c:29:98:c5:69 brd ff:ff:ff:ff:ff:ff

    inet 192.168.133.120/24 brd 192.168.133.255 scope global noprefixroute ens37

       valid_lft forever preferred_lft forever

    inet6 fe80::e007:4abd:58d:5da3/64 scope link noprefixroute

       valid_lft forever preferred_lft forever

4: ens38: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

    link/ether 00:0c:29:98:c5:73 brd ff:ff:ff:ff:ff:ff

    inet 192.168.133.217/24 brd 192.168.133.255 scope global noprefixroute dynamic ens38

       valid_lft 1038sec preferred_lft 1038sec

    inet6 fe80::46fe:1c1:a824:9da9/64 scope link noprefixroute

       valid_lft forever preferred_lft forever

5: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000

    link/ether 52:54:00:a8:7c:6f brd ff:ff:ff:ff:ff:ff

    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0

       valid_lft forever preferred_lft forever

6: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000

link/ether 52:54:00:a8:7c:6f brd ff:ff:ff:ff:ff:ff

[root@liujun network-scripts]# pwd

/etc/sysconfig/network-scripts

[root@liujun network-scripts]# cat ifcfg-ens37

TYPE=Ethernet

PROXY_METHOD=none

BROWSER_ONLY=no

BOOTPROTO=static

DEFROUTE=yes

IPV4_FAILURE_FATAL=no

IPV6INIT=yes

IPV6_AUTOCONF=yes

IPV6_DEFROUTE=yes

IPV6_FAILURE_FATAL=no

IPV6_ADDR_GEN_MODE=stable-privacy

NAME=ens37

UUID=e7191296-fd65-478d-936e-f43dc98f1745

DEVICE=ens37

ONBOOT=yes

IPADDR=192.168.133.120

DNS1=192.168.133.2

GATEWAY=192.168.133.2

PREFIX=24

3.2、修改配置文件

3.2.1、ifcfg-ens37

[root@liujun network-scripts]# vi ifcfg-ens37

按如下修改：

DEVICE=ens37

NAME=ens37

TYPE=Ethernet

BOOTPROTO=none

ONBOOT=yes

MASTER=bond0

SLAVE=yes

USERCTL=no

[root@liujun network-scripts]# cp ifcfg-ens37 ifcfg-ens33

[root@liujun network-scripts]# cp ifcfg-ens37 ifcfg-ens38

3.2.2、ifcfg-ens33

[root@liujun network-scripts]# vi ifcfg-ens33

按如下修改：

DEVICE=ens33

NAME=ens33

TYPE=Ethernet

BOOTPROTO=none

ONBOOT=yes

MASTER=bond0

SLAVE=yes

USERCTL=no

3.2.3、ifcfg-ens38

[root@liujun network-scripts]# vi ifcfg-ens38

按如下修改：

DEVICE=ens38

NAME=ens38

TYPE=Ethernet

BOOTPROTO=none

ONBOOT=yes

MASTER=bond0

SLAVE=yes

USERCTL=no

3.3、配置bond0

[root@liujun network-scripts]# vi ifcfg-bond0

按如下修改

DEVICE=bond0

TYPE=bond0

BONDING_MASTER=yes

BOOTPROTO=none

ONBOOT=yes

IPADDR=192.168.133.120

NETMASK=255.255.255.0

GATEWAY=192.168.133.2

BONDING_OPTS="mode=0 miimon=100"

BONDING_MASTER=yes

NM_CONTROLLED=no

--加载bond模块

[root@liujun network-scripts]# vi /etc/modprobe.d/bonding.conf

添加如下：

alias bond0 binding

options bond0 miimon=100 mode=0

--开启网卡混杂模式

[root@liujun ~]# chmod +x /etc/rc.local

[root@liujun ~]# vi /etc/rc.local

添加如下内容

ip link set ens33 promisc on

ip link set ens37 promisc on

ip link set ens38 promisc on

4、测试

4.1、移除1块网卡

--重启服务器后，移除其中1块网卡进行测试.

[root@liujun ~]# reboot

[root@liujun ~]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

       valid_lft forever preferred_lft forever

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: ens33: <BROADCAST,MULTICAST,PROMISC,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000

    link/ether 00:0c:29:98:c5:5f brd ff:ff:ff:ff:ff:ff

3: ens37: <BROADCAST,MULTICAST,PROMISC,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000

    link/ether 00:0c:29:98:c5:5f brd ff:ff:ff:ff:ff:ff

4: ens38: <BROADCAST,MULTICAST,PROMISC,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000

    link/ether 00:0c:29:98:c5:5f brd ff:ff:ff:ff:ff:ff

5: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000

    link/ether 00:0c:29:98:c5:5f brd ff:ff:ff:ff:ff:ff

    inet 192.168.133.120/24 brd 192.168.133.255 scope global bond0

       valid_lft forever preferred_lft forever

    inet6 fe80::20c:29ff:fe98:c55f/64 scope link

       valid_lft forever preferred_lft forever

6: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000

    link/ether 52:54:00:a8:7c:6f brd ff:ff:ff:ff:ff:ff

    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0

       valid_lft forever preferred_lft forever

7: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000

link/ether 52:54:00:a8:7c:6f brd ff:ff:ff:ff:ff:ff

 

说明：如上显示三张网卡，现移除一块测试.

[root@liujun ~]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

       valid_lft forever preferred_lft forever

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: ens33: <BROADCAST,MULTICAST,PROMISC,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000

    link/ether 00:0c:29:98:c5:5f brd ff:ff:ff:ff:ff:ff

4: ens38: <BROADCAST,MULTICAST,PROMISC,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000

    link/ether 00:0c:29:98:c5:5f brd ff:ff:ff:ff:ff:ff

5: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000

    link/ether 00:0c:29:98:c5:5f brd ff:ff:ff:ff:ff:ff

    inet 192.168.133.120/24 brd 192.168.133.255 scope global bond0

       valid_lft forever preferred_lft forever

    inet6 fe80::20c:29ff:fe98:c55f/64 scope link

       valid_lft forever preferred_lft forever

6: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000

    link/ether 52:54:00:a8:7c:6f brd ff:ff:ff:ff:ff:ff

    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0

       valid_lft forever preferred_lft forever

7: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000

link/ether 52:54:00:a8:7c:6f brd ff:ff:ff:ff:ff:ff

 

说明：如上所示，只剩网卡ens33、ens38.

C:\Users\Administrator>ping 192.168.133.120

 

正在 Ping 192.168.133.120 具有 32 字节的数据:

来自 192.168.133.120 的回复: 字节=32 时间<1ms TTL=64

来自 192.168.133.120 的回复: 字节=32 时间<1ms TTL=64

来自 192.168.133.120 的回复: 字节=32 时间<1ms TTL=64

来自 192.168.133.120 的回复: 字节=32 时间<1ms TTL=64

 

192.168.133.120 的 Ping 统计信息:

    数据包: 已发送 = 4，已接收 = 4，丢失 = 0 (0% 丢失)，

往返行程的估计时间(以毫秒为单位):

    最短 = 0ms，最长 = 0ms，平均 = 0ms

 

说明：移除其中一张网卡后，依然能ping通服务器.

4.2、移除2张网卡

--接下来在移除一张网卡做测试.

[root@liujun ~]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

       valid_lft forever preferred_lft forever

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: ens33: <BROADCAST,MULTICAST,PROMISC,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000

    link/ether 00:0c:29:98:c5:5f brd ff:ff:ff:ff:ff:ff

5: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000

    link/ether 00:0c:29:98:c5:5f brd ff:ff:ff:ff:ff:ff

    inet 192.168.133.120/24 brd 192.168.133.255 scope global bond0

       valid_lft forever preferred_lft forever

    inet6 fe80::20c:29ff:fe98:c55f/64 scope link

       valid_lft forever preferred_lft forever

6: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000

    link/ether 52:54:00:a8:7c:6f brd ff:ff:ff:ff:ff:ff

    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0

       valid_lft forever preferred_lft forever

7: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000

link/ether 52:54:00:a8:7c:6f brd ff:ff:ff:ff:ff:ff

 

说明：如上所示，只剩网卡ens33.

C:\Users\Administrator>ping 192.168.133.120

 

正在 Ping 192.168.133.120 具有 32 字节的数据:

来自 192.168.133.120 的回复: 字节=32 时间<1ms TTL=64

来自 192.168.133.120 的回复: 字节=32 时间<1ms TTL=64

来自 192.168.133.120 的回复: 字节=32 时间<1ms TTL=64

来自 192.168.133.120 的回复: 字节=32 时间<1ms TTL=64

 

192.168.133.120 的 Ping 统计信息:

    数据包: 已发送 = 4，已接收 = 4，丢失 = 0 (0% 丢失)，

往返行程的估计时间(以毫秒为单位):

最短 = 0ms，最长 = 0ms，平均 = 0ms

 

说明：依然能ping通服务器，bond技术有多种，生产环境通常会用到bond4，需结合交换机，设置链路聚合功能.

 

参考网址：https://www.bilibili.com/video/BV1vD4y1U7db/?spm_id_from=333.337.search-card.all.click&vd_source=8c872e2fd1d99229b38a73ed6718b776