用脚本实现“修复连接”的功能

在编程时发现“ipconfig /renew”这条命令不等价于XP/2003在网卡状态查看中提供的“修复”（Repair）按钮，renew或release参数只对DHCP获得的 IP有效。而要真正实现修复连接的功能，还需要其它的步骤。上网搜索发现有人写了个bat文件，能实现类似修复连接的功能：
@echo off
::
:: IPREPAIR.CMD - Attempt to repair the network connections
::
:: Written 12/16/03 by Rick Campbell
::

:: Determine what OS this script is running on.
if not "%OS%"=="Windows_NT" goto :end
ver | find "[Version 5" || goto :end

:: Clear environment variables
set dhcp=

:: Determine if client is dynamically or statically assigned an IP address
echo Determining if client is DHCP based...
for /f "tokens=3 delims= " %%d in (
'netsh int ip sh add ^| find /i "DHCP"'
) do (
set dhcp=%%d
)

:: If client is dynamic, then release and renew the IP address
if /i "%dhcp%"=="Yes" (
echo Client is using DHCP - Renewing the DHCP Address lease...
ipconfig /release > nul
ipconfig /renew > nul
) else (
echo Client is statically assigned - leaving address untouched...
)

:: Flush the ARP, NetBIOS, and DNS cache's
echo Flushing the ARP Cache...
arp -d * > nul
echo Flushing the NetBIOS Cache...
nbtstat -R > nul
echo Flushing the DNS Cache...
ipconfig /flushdns > nul

:: Re-register the NetBIOS and Computer names with WINS and DNS
echo Re-registering the NetBIOS and Computer name with WINS and DNS...
nbtstat -RR > nul
ipconfig /registerdns > nul

goto :eof

:END
echo This script is to be run on Windows 2000/XP/2003 Only!

经实验，其实也并不完全等同于修复连接的功能，但我们可以通过这个批处理文件大致知道Windows修复连接时做了哪些事件。