How do I disable or remove virbr0?

裝完RHEL 5.3後發現多出一塊網路卡，查遍相關設定檔都無此項目，原來這是xen這虛擬化軟體為了讓他的Guest & Host OS們網路溝通用的虛擬網卡。

virbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:57 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:11120 (10.8 KiB)

若不需要xen虛擬化支援就直接將它移除即可

# yum groupremove "Virtualization"
Loaded plugins: rhnplugin, security
Setting up Group Process
Resolving Dependencies
--> Running transaction check
---> Package libvirt.i386 0:0.3.3-14.el5_3.1 set to be erased
--> Processing Dependency: libvirt.so.0 for package: libvirt-python
--> Processing Dependency: libvirt = 0.3.3 for package: libvirt-python
--> Running transaction check
---> Package libvirt-python.i386 0:0.3.3-14.el5_3.1 set to be erased
--> Processing Dependency: libvirt-python for package: rhn-virtualization-host
--> Running transaction check
---> Package rhn-virtualization-host.noarch 0:5.3.0-4.el5sat set to be erased
--> Finished Dependency Resolution

Dependencies Resolved

=======================================================================================================
Package Arch Version Repository Size
=======================================================================================================
Removing:
libvirt i386 0.3.3-14.el5_3.1 installed 3.4 M
Removing for dependencies:
libvirt-python i386 0.3.3-14.el5_3.1 installed 225 k
rhn-virtualization-host noarch 5.3.0-4.el5sat installed 0.0

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 : rhn-virtualization-host [1/3]
Stopping crond: [ OK ]
Starting crond: [ OK ]
Erasing : libvirt [2/3]
Erasing : libvirt-python [3/3]

Removed: libvirt.i386 0:0.3.3-14.el5_3.1
Dependency Removed: libvirt-python.i386 0:0.3.3-14.el5_3.1 rhn-virtualization-host.noarch 0:5.3.0-4.el5sat
Complete!