第十三节

网卡绑定

nmcli方式

1.创建出一个bond网卡

网卡绑定模式：

    1.balance-rr为轮循模式，特点是会根据设备顺序依次传输数据包，提供负载均衡的效果，让带宽的性能更好一些；而且一旦某个网卡发生故障，会马上切换到另外一台网卡设备上，保证网络传输不被中断。

    2.active-backup为主备模式，它的特点是平时只有一块网卡正常工作，另一个网卡随时待命，一旦工作中的网卡发生损坏，待命的网卡会自动顶替上去。

[root@superwu network-scripts]# nmcli connection add type bond con-name bond0 ifname bond0 bond.options "mode=balance-rr"  //创建类型为bond名称为bond0网卡名为bond0的网卡，模式为balance-rr
Connection 'bond0' (d86a9dd3-dc78-4d47-b5fb-c2755be0f270) successfully added.
[root@superwu network-scripts]# ll
total 12
-rw-r--r--. 1 root root 324 Feb 15 18:02 ifcfg-bond0  //会自动生成一个网卡绑定的配置文件
-rw-r--r--. 1 root root 281 Jan 11 16:39 ifcfg-ens160
-rw-r--r--. 1 root root 293 Feb 15 17:54 ifcfg-ens192
[root@superwu network-scripts]# cat ifcfg-bond0 
BONDING_OPTS=mode=balance-rr
TYPE=Bond
BONDING_MASTER=yes
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=dhcp
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=bond0
UUID=d86a9dd3-dc78-4d47-b5fb-c2755be0f270
DEVICE=bond0
ONBOOT=yes

2.向bond网卡中添加从属网卡

[root@superwu network-scripts]# nmcli connection add type ethernet slave-type bond con-name bond0-one ifname ens160 master bond0 //向名称为bond0的bond网卡中添加从属网卡ens160
Connection 'bond0-one' (a66babb3-491c-45aa-a9c0-ad96c2136414) successfully added. //con-name后面接的是从属网卡的名称（可以自行设置），ifname参数接的是网卡的名称（物理存在的网卡）
[root@superwu network-scripts]# nmcli connection add type ethernet slave-type bond con-name bond0-two ifname ens192 master bond0 //向名称为bond0的bond网卡中添加从属网卡ens192
Connection 'bond0-two' (581e79ec-e045-44d5-bd02-dab08cf358a1) successfully added.  

[root@superwu network-scripts]# ll
total 20
-rw-r--r--. 1 root root 324 Feb 15 18:02 ifcfg-bond0
-rw-r--r--. 1 root root 119 Feb 15 18:40 ifcfg-bond0-one
-rw-r--r--. 1 root root 119 Feb 15 18:41 ifcfg-bond0-two  //会生成从属网卡配置文件
-rw-r--r--. 1 root root 281 Jan 11 16:39 ifcfg-ens160
-rw-r--r--. 1 root root 293 Feb 15 17:54 ifcfg-ens192
[root@superwu network-scripts]# cat ifcfg-bond0-one 
TYPE=Ethernet
NAME=bond0-one
UUID=a66babb3-491c-45aa-a9c0-ad96c2136414
DEVICE=ens160
ONBOOT=yes
MASTER=bond0  //ens160网卡已经为bond0的从属网卡
SLAVE=yes

3.配置bond网卡信息　　

配置方式可以使用nmcli，nmtui，编辑配置文件等。

nmcli方式：

[root@superwu network-scripts]# nmcli connection modify bond0 ipv4.addresses 192.168.10.10/24
[root@superwu network-scripts]# nmcli connection modify bond0 ipv4.gateway 192.168.10.254
[root@superwu network-scripts]# nmcli connection modify bond0 ipv4.dns 192.168.10.254
[root@superwu network-scripts]# nmcli connection modify bond0 ipv4.method manual  //模式为手动模式
[root@superwu network-scripts]# cat ifcfg-bond0
BONDING_OPTS=mode=balance-rr
TYPE=Bond
BONDING_MASTER=yes
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
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=bond0
UUID=d86a9dd3-dc78-4d47-b5fb-c2755be0f270
DEVICE=bond0
ONBOOT=yes
IPADDR=192.168.10.10
PREFIX=24
GATEWAY=192.168.10.254
DNS1=192.168.10.254

4.启动bond网卡

[root@superwu network-scripts]# nmcli connection up bond0  
Connection successfully activated (master waiting for slaves) (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/6)
[root@superwu network-scripts]# nmcli connection show 
NAME       UUID                                  TYPE      DEVICE 
bond0      d86a9dd3-dc78-4d47-b5fb-c2755be0f270  bond      bond0  
ens160     9af34300-fc6a-494c-929d-f9037bf802af  ethernet  ens160 
ens192     6dbbf7ec-1382-4d8c-83d2-61515e33fbd0  ethernet  ens192 
virbr0     932c9736-d139-4822-a5c1-8f8f907c27f5  bridge    virbr0 
bond0-one  a66babb3-491c-45aa-a9c0-ad96c2136414  ethernet  --     
bond0-two  581e79ec-e045-44d5-bd02-dab08cf358a1  ethernet  --     
[root@superwu network-scripts]# nmcli device status 
DEVICE      TYPE      STATE      CONNECTION 
bond0       bond      connected  bond0      
ens160      ethernet  connected  ens160     
ens192      ethernet  connected  ens192     
virbr0      bridge    connected  virbr0     
lo          loopback  unmanaged  --         
virbr0-nic  tun       unmanaged  --         
[root@superwu network-scripts]# ip addr
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: ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:0c:29:7b:9d:e7 brd ff:ff:ff:ff:ff:ff
    inet 192.168.183.133/24 brd 192.168.183.255 scope global dynamic noprefixroute ens160
       valid_lft 730sec preferred_lft 730sec
    inet6 fe80::d496:6a1f:2d6f:f285/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:0c:29:7b:9d:f1 brd ff:ff:ff:ff:ff:ff
    inet 192.168.183.134/24 brd 192.168.183.255 scope global dynamic noprefixroute ens192
       valid_lft 1179sec preferred_lft 1179sec
    inet6 fe80::bf0e:7ce3:e187:3eff/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:eb:ed:e6 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
5: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:eb:ed:e6 brd ff:ff:ff:ff:ff:ff
6: bond0: <NO-CARRIER,BROADCAST,MULTICAST,MASTER,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether de:4b:71:3a:d9:39 brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.10/24 brd 192.168.10.255 scope global noprefixroute bond0
       valid_lft forever preferred_lft forever