问题描述：我已经安装了Red Hat Enterprise Linux 5.2，并且看到virbr0网络接口和eth0接口吗？
这是什么？
如何禁用或者删除virbr0？

A. virbr0是虚拟化来宾和主机用于网络通信的xen接口。
以下是Red Hat/CentOS Linux下的软件包：组：虚拟化描述：虚拟化支持。
强制性软件包：- xen - kernel-xen默认软件包：- virt-manager - Virtualization-en-US - gnome-applet-vm - libvirt如果不需要xen Virtualization支持，可以禁用virbr0，执行：

# yum groupremove "Virtualization"

输出示例：

Loading "rhnplugin" plugin
Loading "security" plugin
Setting up Group Process
rhel-x86_64-server-vt-5   100% |=========================| 1.4 kB    00:00     
rhn-tools-rhel-x86_64-ser 100% |=========================| 1.2 kB    00:00     
rhel-x86_64-server-5      100% |=========================| 1.4 kB    00:00     
No package matched to remove
No package matched to remove
No package matched to remove
No package matched to remove
No package matched to remove
Resolving Dependencies
--> Running transaction check
---> Package libvirt.x86_64 0:0.3.3-7.el5 set to be erased
--> Processing Dependency: libvirt.so.0()(64bit) for package: libvirt-python
--> Processing Dependency: libvirt = 0.3.3 for package: libvirt-python
--> Running transaction check
---> Package libvirt-python.x86_64 0:0.3.3-7.el5 set to be erased
--> Processing Dependency: libvirt-python for package: rhn-virtualization-host
--> Running transaction check
---> Package rhn-virtualization-host.noarch 0:1.0.1-55 set to be erased
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================
Package                 Arch       Version          Repository        Size 
=============================================================================
Removing:
libvirt                 x86_64     0.3.3-7.el5      installed         3.4 M
Removing for dependencies:
libvirt-python          x86_64     0.3.3-7.el5      installed         230 k
rhn-virtualization-host  noarch     1.0.1-55         installed         155 k

Transaction Summary
=============================================================================
Install      0 Package(s)         
Update       0 Package(s)         
Remove       3 Package(s)         

Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Erasing   : libvirt-python               ######################### [1/3] 
  Erasing   : rhn-virtualization-host      ######################### [2/3] 
Stopping crond: [  OK  ]
Starting crond: [  OK  ]
  Erasing   : libvirt                      ######################### [3/3] 

Removed: libvirt.x86_64 0:0.3.3-7.el5
Dependency Removed: libvirt-python.x86_64 0:0.3.3-7.el5 rhn-virtualization-host.noarch 0:1.0.1-55
Complete!