linux 7通过nmtui工具可以轻松绑定双网卡，不需要像以前版本那样繁琐地修改配置文件，安装操作系统时可以直接配置。本文主要记录使用情况nmtui工具配置双网卡绑定过程。
使用root用户执行nmtui命令，启动nmtui工具管理界面，以及以前版本setup工具相似。
[root@SL010A-IVDB01 ~]# nmtui
选择Add按钮，回车。
选择添加类型Bond，即双网卡绑定。
上部设置双网卡绑定名称，中间模式选择Active Backup，然后选择Add将要绑定的网卡添加到按钮辆。
这里选择网卡类型，因为要绑定的网卡是千兆以太网，所以这里选择Ethernet，回车。
在这里设置绑定网卡的名称，然后选择OK按钮，回车。
同上，添加第二张网卡，选择OK按钮，回车。
添加两张网卡后，基本上是上图 这样，如果你想直接配置这个页面，IP，选择Show按钮，回车。
然后填写IP地址和网关可以在这里填写MASK配置地址的选项栏需要IP地址在IP直接写在后面， 255.255.255.0是/24，例如192.168.100.98/24。然后选择OK按钮，回车。
回车后，返回初始界面，选择OK，回车结束配置。这样，双网卡绑定就结束了。可以通过ifconfig命令查看网卡信息。
[root@SL010A-IVDB01 ~]# ifconfig
bond0: flags=5187 mtu 1500
inet 192.168.100.98 netmask 255.255.255.0 broadcast 192.168.100.255
inet6 fe80::224e:a422:6672:56e2 prefixlen 64 scopeid 0x20
ether 98:be:94:35:74:80 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 10 bytes 1180 (1.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno1: flags=6211 mtu 1500
ether 98:be:94:35:74:80 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 10 bytes 1180 (1.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno2: flags=6211 mtu 1500
ether 98:be:94:35:74:80 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp0s29f0u2: flags=4163 mtu 1500
ether 9a:be:94:35:f4:83 txqueuelen 1000 (Ethernet)
RX packets 1077 bytes 70075 (68.4 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens2f0: flags=4099 mtu 1500
ether 90:e2:ba:6a:66:c8 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device memory 0xc0700000-c077ffff
ens2f1: flags=4099 mtu 1500
ether 90:e2:ba:6a:66:c9 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device memory 0xc0780000-c07fffff
ens3f0: flags=4163 mtu 1500
inet 10.0.2.98 netmask 255.255.255.0 broadcast 10.0.2.255
inet6 fe80::e5bf:ef44:c11b:ad0 prefixlen 64 scopeid 0x20
ether 90:e2:ba:8c:5c:e8 txqueuelen 1000 (Ethernet)
RX packets 23158 bytes 1472551 (1.4 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 3378 bytes 1419406 (1.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens3f1: flags=4099 mtu 1500
ether 90:e2:ba:8c:5c:e9 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73 mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1000 (Local Loopback)
RX packets 336 bytes 31332 (30.5 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 336 bytes 31332 (30.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099 mtu 1500
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
ether 52:54:00:63:fe:75 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
通过查看/可用proc/net/bonding/bond查看双网卡绑定状态。
[root@SL010A-IVDB01 ~]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eno1
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eno1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 98:be:94:35:74:80
Slave queue ID: 0
Slave Interface: eno2
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 98:be:94:35:74:82
Slave queue ID: 0
可以看到当前活跃的网卡是eno1，可用关闭/启动这个网卡来测试双网卡绑定是否成功。
[root@SL010A-IVDB01 ~]# nmcli connection down eno1
[root@SL010A-IVDB01 ~]# nmcli connection up eno1
[root@SL010A-IVDB01 ~]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eno2
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eno2
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 98:be:94:35:74:82
Slave queue ID: 0
Slave Interface: eno1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 98:be:94:35:74:80
Slave queue ID: 0
可以看到活跃网卡切换到了eno2网卡，可用使用其他机器ping绑定后的网卡的IP，进行连通性测试。如果网卡切换后，网络一直通，则配置完成。