linux-xen-virbr0消失了？网上只有抄写怎么卸载virbr0的网卡，没人写怎么恢复的，我来补一个完整的

linux-xen-virbr0

这里使用的管理命令是virsh

virsh的详细命令解释请看地址：点这里跳转到virsh的详细命令解释请看地址

先讲下怎么启动

删除过程

去掉auto运行-》取消激活-》删除网卡

恢复过程

根据默xml文件生成虚拟网卡（可用正常需要保存状态，下次启动自动启动）-》加入auto

delete virbr0

[root@localhost ~]# virsh
Welcome to virsh, the virtualization interactive terminal.

Type:  'help' for help with commands
       'quit' to quit

virsh # net-list
Name                 State      Autostart
-----------------------------------------
default              active     yes      

virsh # net-autostart --disable default
Network default unmarked as autostarted

virsh # net-destroy default
Network default destroyed

virsh #
virsh # quit

[root@localhost ~]# service  libvirtd restart
Stopping libvirtd daemon:                                  [  OK  ]
Starting libvirtd daemon:                                  [  OK  ]
[root@localhost ~]#

add virbr0

[root@localhost ~]# virsh
Welcome to virsh, the virtualization interactive terminal.

Type:  'help' for help with commands
       'quit' to quit

virsh # net-create /usr/share/libvirt/networks/default.xml
Network default created from /usr/share/libvirt/networks/default.xml

virsh # net-list
Name                 State      Autostart
-----------------------------------------
default              active     no       

virsh # net-autostart default
Network default marked as autostarted

virsh # net-list
Name                 State      Autostart
-----------------------------------------
default              active     yes      

virsh # quit

[root@localhost ~]# service  libvirtd restart
Stopping libvirtd daemon:                                  [  OK  ]
Starting libvirtd daemon:                                  [  OK  ]
[root@localhost ~]# ifconfig

delete virbr0
[root@localhost ~]# virsh
Welcome to virsh, the virtualization interactive terminal.

Type:  'help' for help with commands
       'quit' to quit

virsh # net-list
Name                 State      Autostart
-----------------------------------------
default              active     yes      

virsh # net-autostart --disable default
Network default unmarked as autostarted

virsh # net-destroy default
Network default destroyed

virsh #
virsh # quit

[root@localhost ~]# service  libvirtd restart
Stopping libvirtd daemon:                                  [  OK  ]
Starting libvirtd daemon:                                  [  OK  ]
[root@localhost ~]#

add virbr0
[root@localhost ~]# virsh
Welcome to virsh, the virtualization interactive terminal.

Type:  'help' for help with commands
       'quit' to quit

virsh # net-create /usr/share/libvirt/networks/default.xml
Network default created from /usr/share/libvirt/networks/default.xml

virsh # net-list
Name                 State      Autostart
-----------------------------------------
default              active     no       

virsh # net-autostart default
Network default marked as autostarted

virsh # net-list
Name                 State      Autostart
-----------------------------------------
default              active     yes      

virsh # quit

[root@localhost ~]# service  libvirtd restart
Stopping libvirtd daemon:                                  [  OK  ]
Starting libvirtd daemon:                                  [  OK  ]
[root@localhost ~]# ifconfig