Centos Linux创建网桥交换机

方法一：通过nmcli命令创建

[root@sre01 ~]# nmcli connection add type bridge con-name br0 ifname br0
Connection 'br0' (cf1064f0-9b88-430f-988a-c4917b51bc21) successfully added.

[root@sre01 ~]# nmcli connection up br0
Connection successfully activated (master waiting for slaves) (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/24)

[root@sre01 ~]# nmcli connection add type bridge-slave con-name br0-port0 ifname ens37 master br0
Connection 'br0-port0' (47402eed-b0b2-4f4f-b1c8-92919c5f319a) successfully added.

[root@sre01 ~]# nmcli connection add type bridge-slave con-name br0-port1 ifname ens38 master br0
Connection 'br0-port1' (e25340ff-157c-4b58-b53a-34e0d75a811e) successfully added.

[root@sre01 ~]# nmcli connection up br0-port0
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/25)

[root@sre01 ~]# nmcli connection up br0-port1
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/26)
[root@sre01 ~]# 
[root@sre01 ~]# 

[root@sre01 ~]# nmcli connection 
NAME                UUID                                  TYPE      DEVICE 
ens33               7791cb1b-8774-49e8-8eaa-fa131ab6c509  ethernet  ens33  
br0                 cf1064f0-9b88-430f-988a-c4917b51bc21  bridge    br0    
demo                83e8c326-356c-46e6-b83e-bdef791c5eb7  ethernet  ens36  
br0-port0           47402eed-b0b2-4f4f-b1c8-92919c5f319a  ethernet  ens37  
br0-port1           e25340ff-157c-4b58-b53a-34e0d75a811e  ethernet  ens38  

[root@sre01 ~]# nmcli dev show br0
GENERAL.DEVICE:                         br0
GENERAL.TYPE:                           bridge
GENERAL.HWADDR:                         00:0C:29:C0:78:E5
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     br0
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/24
IP4.ADDRESS[1]:                         172.16.156.129/24
IP4.GATEWAY:                            --
IP4.ROUTE[1]:                           dst = 172.16.156.0/24, nh = 0.0.0.0, mt = 425
IP4.DNS[1]:                             172.16.156.1
IP4.DOMAIN[1]:                          localdomain
IP6.ADDRESS[1]:                         fe80::630f:27cc:83c1:e20f/64
IP6.GATEWAY:                            --
IP6.ROUTE[1]:                           dst = fe80::/64, nh = ::, mt = 425
IP6.ROUTE[2]:                           dst = ff00::/8, nh = ::, mt = 256, table=255

[root@sre01 ~]#  bridge link show
4: ens37 state UP : <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 100 
5: ens38 state UP : <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 100 


[root@sre01 ~]# ip link show master br0
4: ens37: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP mode DEFAULT group default qlen 1000
    link/ether 00:0c:29:c0:78:e5 brd ff:ff:ff:ff:ff:ff
5: ens38: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP mode DEFAULT group default qlen 1000
    link/ether 00:0c:29:c0:78:ef brd ff:ff:ff:ff:ff:ff


删除网桥
[root@sre01 ~]# nmcli connection down br0
Connection 'br0' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/24)
[root@sre01 ~]# nmcli connection delete br0
Connection 'br0' (cf1064f0-9b88-430f-988a-c4917b51bc21) successfully deleted.
[root@sre01 ~]# nmcli connection 
NAME                UUID                                  TYPE      DEVICE 
ens33               7791cb1b-8774-49e8-8eaa-fa131ab6c509  ethernet  ens33  
demo                83e8c326-356c-46e6-b83e-bdef791c5eb7  ethernet  ens36  
Wired connection 1  4b15b5a3-1649-3890-ad4e-66b4b5b52933  ethernet  ens37  
Wired connection 2  d2f61a05-feb5-3967-9c26-7f86c551f1ac  ethernet  ens38  
br0-port0           47402eed-b0b2-4f4f-b1c8-92919c5f319a  ethernet  --     
br0-port1           e25340ff-157c-4b58-b53a-34e0d75a811e  ethernet  --   

方法二：通过brctl命令

[root@sre01 ~]# yum install bridge-utils

[root@sre01 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.000c29c078e5       yes             ens37
                                                        ens38
                                                        
[root@sre01 ~]# brctl showmacs br0
port no mac addr                is local?       ageing timer
  1     00:0c:29:c0:78:e5       yes                0.00
  1     00:0c:29:c0:78:e5       yes                0.00
  2     00:0c:29:c0:78:ef       yes                0.00
  2     00:0c:29:c0:78:ef       yes                0.00
  
创建新网桥
[root@sre01 ~]# brctl addbr br1
[root@sre01 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.000c29c078e5       yes             ens37
                                                        ens38
br1             8000.000000000000       no

[root@sre01 ~]# ifconfig br1 up

从旧网桥删除接口
[root@sre01 ~]# brctl delif br0 ens37
[root@sre01 ~]# brctl delif br0 ens38
[root@sre01 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.000000000000       yes
br1             8000.000000000000       no

给新网桥添加接口
[root@sre01 ~]# brctl addif br1 ens38
[root@sre01 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.000000000000       yes
br1             8000.000c29c078ef       no              ens38

[root@sre01 ~]# brctl addif br1 ens37
[root@sre01 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.000000000000       yes
br1             8000.000c29c078e5       no              ens37
                                                        ens38
[root@sre01 ~]# 


为网桥开启stp生成树协议
[root@sre01 ~]# brctl stp br1 on
[root@sre01 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.000000000000       yes
br1             8000.000c29c078e5       yes             ens37
                                                        ens38