Linux 高级网络设置

其他 2019-02-19 21:52:16 阅读次数: 0

一、链路聚合
网卡的绑定
链路聚合接口
（1）添加链路接口
在添加链路接口之前需满足虚拟机有两个网卡以供实验并清掉网卡上配置的ip
查看网卡

[root@localhost ~]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 52:54:00:bc:be:27  txqueuelen 1000  (Ethernet)
        RX packets 596  bytes 31224 (30.4 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

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 52:54:00:88:4e:f3  txqueuelen 1000  (Ethernet)
        RX packets 18  bytes 1130 (1.1 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

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 24  bytes 2120 (2.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 24  bytes 2120 (2.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:20:94:8d  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

（2）添加链路
在这里插入图片描述

注意：一个设备上只能有一个链路，当生成链路时会随之生成一个ip，若之前生成链路时不小心写错，需将原来错的链路删除再生成新的链路（nm-connection-editor）
（3）查看链路
在这里插入图片描述

（4）监控链路与网卡
查看链路与网卡
在这里插入图片描述

（5）添加硬件到网卡
在这里插入图片描述

（6）此时可以在真机上ping给链路添加的ip，此时链路上添加了两块硬盘（eth0/eth1）,若将eth0down掉（ifconfig eth0 down）ping结束。
将eth1加入链路，此时eth0正在使用，eth1备用

[root@localhost ~]# 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: eth0
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eth0
MII Status: up
Speed: Unknown
Duplex: Unknown
Link Failure Count: 0
Permanent HW addr: 52:54:00:bc:be:27
Slave queue ID: 0

Slave Interface: eth1
MII Status: up

若将eth0 down掉，eth1成为主工作网卡

[root@localhost ~]# ifconfig eth0 down
[root@localhost ~]# 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: eth1
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eth0
MII Status: down   ##eth0是down掉的
Speed: Unknown
Duplex: Unknown
Link Failure Count: 1
Permanent HW addr: 52:54:00:bc:be:27
Slave queue ID: 0

Slave Interface: eth1
MII Status: up
Speed: Unknown
Duplex: Unknown
Link Failure Count: 0
Permanent HW addr: 52:54:00:88:4e:f3
Slave queue ID: 0
[root@localhost ~]#

恢复eth0，eth0为备用网卡

[root@localhost ~]# ifconfig eth0 up
[root@localhost ~]# 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: eth1
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eth0
MII Status: up
Speed: Unknown
Duplex: Unknown
Link Failure Count: 1
Permanent HW addr: 52:54:00:bc:be:27
Slave queue ID: 0

Slave Interface: eth1
MII Status: up
Speed: Unknown
Duplex: Unknown
Link Failure Count: 0
Permanent HW addr: 52:54:00:88:4e:f3
Slave queue ID: 0
[root@localhost ~]#

（7）查看链路及硬件连接
在这里插入图片描述

2、文本编辑方式
删除之前建立的链路以及网卡连接
（1）建立链路编辑文件

[root@localhost network-scripts]# vim ifcfg-bond0

在这里插入图片描述

[root@localhost network-scripts]# systemctl restart network
[root@localhost network-scripts]# ifconfig
bond0: flags=5123<UP,BROADCAST,MASTER,MULTICAST>  mtu 1500
        inet 172.25.254.155  netmask 255.255.255.0  broadcast 172.25.254.255
        ether 92:3b:d9:0f:57:d0  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

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 52:54:00:bc:be:27  txqueuelen 1000  (Ethernet)
        RX packets 1921  bytes 100248 (97.8 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 36  bytes 4924 (4.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 52:54:00:88:4e:f3  txqueuelen 1000  (Ethernet)
        RX packets 1376  bytes 75033 (73.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3  bytes 182 (182.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 24  bytes 2120 (2.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 24  bytes 2120 (2.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:20:94:8d  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

[root@localhost network-scripts]#

（2）设置网卡文件，将网卡添加至链路

[root@localhost network-scripts]# vim ifcfg-eth0

在这里插入图片描述

（3）查看链路与网卡

[root@localhost network-scripts]# systemctl restart network
[root@localhost network-scripts]# nmcli connection show
NAME         UUID                                  TYPE            DEVICE 
Bond bond0   ad33d8b0-1f7b-cab9-9447-ba07f855b143  bond            bond0  
System eth0  5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03  802-3-ethernet  eth0   
System eth1  9c92fad9-6ecb-3e6c-eb4d-8a47c6f50c04  802-3-ethernet  eth1   
virbr0       3db95441-f28c-4494-8cf2-6a889405b8fc  bridge          virbr0 
[root@localhost network-scripts]#

二。tem格式
设置tem链路方式之前需将bond方式删除

（1）添加team链路
在这里插入图片描述

（2）查看链路

[root@localhost ~]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 52:54:00:bc:be:27  txqueuelen 1000  (Ethernet)
        RX packets 2473  bytes 129852 (126.8 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 45  bytes 5960 (5.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 52:54:00:88:4e:f3  txqueuelen 1000  (Ethernet)
        RX packets 1931  bytes 104352 (101.9 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 9  bytes 1257 (1.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 24  bytes 2120 (2.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 24  bytes 2120 (2.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

team0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 172.25.254.155  netmask 255.255.255.0  broadcast 172.25.254.255
        ether 3e:84:26:76:b0:52  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

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:20:94:8d  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

[root@localhost ~]#

（3）监控链路信息

[root@localhost ~]# teamdctl team0 stat
setup:
  runner: activebackup
runner:
  active port: 
[root@localhost ~]#

此时链路与硬盘无任何关系，将硬盘和链路连接起来

[root@localhost ~]# nmcli connection add con-name eth0 ifname eth0 type team-slave master team0
Connection 'eth0' (985f8328-0b61-432f-97da-e021c91c6d0a) successfully added.
[root@localhost ~]# nmcli connection add con-name eth1 ifname eth1 type team-slave master team0
Connection 'eth1' (7c5f2413-7430-4253-b85f-e46047ac1b94) successfully added.
[root@localhost ~]#

[root@localhost ~]# teamdctl team0 statsetup:
  runner: activebackup
ports:
  eth0
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
        down count: 0
  eth1
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
        down count: 0
runner:
  active port: eth0
[root@localhost ~]#

（4）文本方式创建team链路
将之前创建的team链路删除

[root@localhost ~]# nmcli connection 
NAME   UUID                                  TYPE            DEVICE 
eth1   695df1fd-a065-40c3-8698-4166f857cc7c  802-3-ethernet  eth1   
eth0   2b937281-3ab7-43fa-8212-a973e4005c22  802-3-ethernet  eth0   
team0  3745233e-b7d0-47c4-ae8c-bf65a99c299c  team            team0  
[root@localhost ~]# nmcli connection delete team0
[root@localhost ~]# nmcli connection show
NAME  UUID                                  TYPE            DEVICE 
eth1  695df1fd-a065-40c3-8698-4166f857cc7c  802-3-ethernet  --     
eth0  2b937281-3ab7-43fa-8212-a973e4005c22  802-3-ethernet  --     
[root@localhost ~]# nmcli connection delete eth0
[root@localhost ~]# nmcli connection delete eth1
[root@localhost ~]# nmcli connection show
NAME  UUID  TYPE  DEVICE 
[root@localhost ~]#

（2）文本创建链路

[root@localhost network-scripts]# vim ifcfg-team0
[root@localhost network-scripts]#

在这里插入图片描述

（3）查看链路

[root@localhost network-scripts]# teamdctl team0 stat
setup:
  runner: activebackup
runner:
  active port: 
[root@localhost network-scripts]#

（4）将硬件添加进链路

[root@localhost network-scripts]# vim ifcfg-eth0
[root@localhost network-scripts]#

在这里插入图片描述

（5）查看

[root@localhost network-scripts]# systemctl restart network
[root@localhost network-scripts]# teamdctl team0 stat
setup:
  runner: activebackup
ports:
  eth0
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
        down count: 0
runner:
  active port: eth0
[root@localhost network-scripts]#

3、桥接
删除原来的网络配置，包含wifi
重新设置桥接

[root@localhost network-scripts]# vim ifcfg-enp0s25

在这里插入图片描述

网桥的作用
（1）网卡配置
先看虚拟机安装的时候有没有通过桥接建立（虚拟机使用的是真机的桥接，刚才全部删除，所以此时没有br0

[root@localhost network-scripts]# virt-manager
[root@localhost network-scripts]#

打开虚拟机—灯泡—看网卡—Network source没有桥接（br0）
现在建立桥接

[root@localhost network-scripts]# vim ifcfg-enp0s25 
[root@foundation33 network-scripts]#

在这里插入图片描述

（2）配置br0

[root@localhost network-scripts]# vim ifcfg-br0

在这里插入图片描述

（3）显示桥接控制

[root@localhost  network-scripts]# ifconfig
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.25.254.55  netmask 255.255.255.0  broadcast 172.25.254.255
        inet6 fe80::221:ccff:fe6e:d458  prefixlen 64  scopeid 0x20<link>
        ether 00:21:cc:6e:d4:58  txqueuelen 0  (Ethernet)
        RX packets 66  bytes 3125 (3.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 29  bytes 4226 (4.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp0s25: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 00:21:cc:6e:d4:58  txqueuelen 1000  (Ethernet)
        RX packets 472755  bytes 204334008 (194.8 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 87283  bytes 6744710 (6.4 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 20  memory 0xf2500000-f2520000  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        RX packets 1156380  bytes 418713609 (399.3 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1156380  bytes 418713609 (399.3 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 52:54:00:f6:38:fa  txqueuelen 0  (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

virbr1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 52:54:00:75:6d:fd  txqueuelen 0  (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

wlp3s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 08:11:96:b9:a2:44  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

[root@localhost  network-scripts]#

（4）再次查看虚拟机网络源设置
打开虚拟机—灯泡—看网卡—Network source有桥接（br0）

手动建立网桥
进入虚拟机，删除之前所有网络设置

(1)手动建立

[root@localhost network-scripts]# ifconfig
enp2s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 20:1a:06:3d:ef:79  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 interrupt 16  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 87  bytes 11658 (11.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 87  bytes 11658 (11.3 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 52:54:00:aa:5c:55  txqueuelen 1000  (Ethernet)
        RX packets 117  bytes 12715 (12.4 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6  bytes 748 (748.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vnet0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::fc54:ff:febc:be27  prefixlen 64  scopeid 0x20<link>
        ether fe:54:00:bc:be:27  txqueuelen 1000  (Ethernet)
        RX packets 107  bytes 12917 (12.6 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 4131  bytes 216072 (211.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vnet1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::fc54:ff:fe88:4ef3  prefixlen 64  scopeid 0x20<link>
        ether fe:54:00:88:4e:f3  txqueuelen 1000  (Ethernet)
        RX packets 10  bytes 1436 (1.4 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3651  bytes 197549 (192.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp3s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 2a:fa:50:e1:89:e1  txqueuelen 1000  (Ethernet)
        RX packets 12227  bytes 1757619 (1.6 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1989  bytes 224076 (218.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@localhost network-scripts]#

(2)添加桥接

[root@localhost ~]# brctl addbr br0

(2）给网桥添加网卡

[root@localhost ~]# ifconfig br0 172.25.254.55/24
[root@localhost ~]# ifconfig
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.25.254.55  netmask 255.255.255.0  broadcast 172.25.254.255
        inet6 fe80::88a1:11ff:feb9:ef81  prefixlen 64  scopeid 0x20<link>
        ether 8a:a1:11:b9:ef:81  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 30  bytes 4403 (4.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp2s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 20:1a:06:3d:ef:79  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 interrupt 16  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 87  bytes 11658 (11.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 87  bytes 11658 (11.3 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 52:54:00:aa:5c:55  txqueuelen 1000  (Ethernet)
        RX packets 117  bytes 12715 (12.4 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6  bytes 748 (748.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vnet0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::fc54:ff:febc:be27  prefixlen 64  scopeid 0x20<link>
        ether fe:54:00:bc:be:27  txqueuelen 1000  (Ethernet)
        RX packets 107  bytes 12917 (12.6 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 4233  bytes 221376 (216.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vnet1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::fc54:ff:fe88:4ef3  prefixlen 64  scopeid 0x20<link>
        ether fe:54:00:88:4e:f3  txqueuelen 1000  (Ethernet)
        RX packets 10  bytes 1436 (1.4 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3753  bytes 202853 (198.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp3s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether c6:68:1f:17:fc:b8  txqueuelen 1000  (Ethernet)
        RX packets 12227  bytes 1757619 (1.6 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1989  bytes 224076 (218.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@localhost ~]#

(4)显示桥接


[root@localhost Desktop]# brctl show
bridge name	bridge id		STP enabled	interfaces
br0		8000.000000000000	no		
[root@localhost Desktop]# brctl addif br0 eth0 ##将网卡添加进网桥
[root@localhost Desktop]# brctl show
bridge name	bridge id		STP enabled	interfaces
br0		8000.52540000210b	no		eth0
[root@localhost Desktop]#

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