用bridge创建虚拟网桥

利用bridge创建虚拟网络

文章目录

• 利用bridge创建虚拟网络
• • 前言
  • 安装网桥模块
  • 创建一个逻辑网段
  • 编辑网卡
  • 进行查看

前言

网桥，简而言之就是一张网卡作为另一张网卡的接口。

安装网桥模块

yum install -y bridge-utils

[root@hoyeong ~]# yum install -y bridge-utils
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.ustc.edu.cn
 * extras: mirrors.ustc.edu.cn
 * updates: mirrors.ustc.edu.cn
Package bridge-utils-1.5-9.el7.x86_64 already installed and latest version
Nothing to do
# 已经安装好了

#进行查看
[root@hoyeong ~]# lsmod | grep bridge
[root@hoyeong ~]# modprobe bridge
[root@hoyeong ~]# lsmod | grep bridge
bridge                151336  0 
stp                    12976  1 bridge
llc                    14552  2 stp,bridge

创建一个逻辑网段

brcti命令–可以使用帮助文档进行学习

brictl addbr br0

[root@hoyeong ~]# brctl addbr br0
[root@hoyeong ~]# 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:df:3a:a1 brd ff:ff:ff:ff:ff:ff
    inet 192.168.200.130/24 brd 192.168.200.255 scope global noprefixroute dynamic ens33
       valid_lft 1639sec preferred_lft 1639sec
    inet6 fe80::fe8f:a78a:691f:6e62/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: ens34: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:df:3a:ab brd ff:ff:ff:ff:ff:ff
4: br0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 86:69:2b:05:84:85 brd ff:ff:ff:ff:ff

编辑网卡

将ens33作为接口，搭建在br0上

[root@hoyeong ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens33
DEVICE=ens33
ONBOOT=yes
TYPE=Ethernet
NM_CONTROLLED=no
BRIDGE=br0

##貌似必须要用static模式才行
[root@hoyeong ~]# cat /etc/sysconfig/network-scripts/ifcfg-br0
DEVICE=br0
ONBOOT=yes
TYPE=bridge
BOOTPROTO=static
NM_CONLTROLLED=no
IPADDR=192.168.200.100
GATEWAY=192.138.200.1
NETMASK=255.255.255.0

进行查看

[root@hoyeong ~]# 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 master br0 state UP group default qlen 1000
link/ether 00:0c:29:df:3a:a1 brd ff:ff:ff:ff:ff:ff
3: ens34: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:df:3a:ab brd ff:ff:ff:ff:ff:ff
5: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:0c:29:df:3a:a1 brd ff:ff:ff:ff:ff:ff
inet 192.168.200.100/24 brd 192.168.200.255 scope global noprefixroute br0
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fedf:3aa1/64 scope link
valid_lft forever preferred_lft forever

#如上所示，把ens33作为接口搭建在br0上