======KVM網路參數配置======
在建立Guest Os之前,需把host OS的網路參數配置好。在KVM中有Bridge,NAT及Host only這三種，本篇主要以Bridge(橋接)為主。

網路參數說明:
<code 1>
DEVICE (網卡名稱)
TYPE   (網卡以一類方式工作:
          Etherent
          Bridge
          Bondle)   
HWADDR    (MAC Address)
NM_CONTROLLED   (no  不受NetworkManager控制。不過通常 都會直接關閉 /etc/init.d/NetworkManager)
ONBOOT    (yes 開機直接起動此裝置)
PEERDNS   (no  要求dhcp不可覆蓋 /etc/resolv.conf)
BOOTPROTO [static|dhcp|none]
IPADDR     (ip)
NETMASK    (網路遮罩)

BRIDGE     (此網卡關連的網橋名稱)
</code>

<code>
#vim /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE="eth0"
TYPE=Etherent
HWADDR="E2:C1:FA:69:CD:37"
NM_CONTROLLED="no"
ONBOOT="yes"
PEERDNS="no"
BOOTPROTO="static"
BRIDGE=br0
</code>

<code>
#vim /etc/sysconfig/network-scripts/ifcfg-br0

DEVICE="br0"
TYPE=Bridge
HWADDR="E2:C1:FA:69:CD:38"
NM_CONTROLLED="no"
ONBOOT="yes"
PEERDNS="no"
BOOTPROTO="static"
IPADDR=192.168.0.162
NETMASK=255.255.255.0
</code>