有關IPv6

Windows XP 預設沒有啟動IPv6，需要手動啟動。
在假DOS下鍵入
ipv6 install
即可。

如果想要關閉的話，請鍵入
ipv6 uninstall
(有時候使用IPv6的話，網路會變得比較慢。)
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不知道到底有沒有啟動，請鍵入
ipv6 if
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進入某些server時會限制沒有啟動ipv6的client進入，所以要記得啟動，雖然Windows XP這個IPv6是假的！
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有點軟的有點囉唆(完整)說明

Q.	How do I install the IPv6 protocol for Windows XP?
A.	To install the IPv6 protocol for Windows XP with SP2, do the following: 1. Log on to the computer with a user account that has privileges to change network configuration. 2. Click Start, click Control Panel, and then double-click Network Connections. 3. Right-click any local area connection, and then click Properties. 4. Click Install. 5. In the Select Network Component Type dialog box, click Protocol, and then click Add. 6. In the Select Network Protocol dialog box, click Microsoft TCP/IP version 6, and then click OK. 7. Click Close to save changes to your network connection. Alternately, from the Windows XP desktop, click Start, point to Programs, point to Accessories, and then click Command Prompt. At the command prompt, type netsh interface ipv6 install. For the IPv6 protocol for Windows XP with SP1, do the following: 1. Log on to the computer with a user account that has privileges to change network configuration. 2. Click Start, click Control Panel, and then double-click Network Connections. 3. Right-click any local area connection, and then click Properties. 4. Click Install. 5. In the Select Network Component Type dialog box, click Protocol, and then click Add. 6. In the Select Network Protocol dialog box, click Microsoft IPv6 Developer Edition, and then click OK. 7. Click Close to save changes to your network connection. Alternately, from the Windows XP desktop, click Start, point to Programs, point to Accessories, and then click Command Prompt. At the command prompt, type netsh interface ipv6 install. To install the IPv6 protocol for Windows XP with no service packs installed: 1. Log on to the computer running Windows XP with a user account that has privileges to change network configuration. 2. Open a command prompt. From the Windows XP desktop, click Start, point to Programs, point to Accessories, and then click Command Prompt. 3. At the command prompt, type ipv6 install. Regardless of the version of Windows XP, to use RPC applications over IPv6, you must first restart the computer.

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另，若想要在Linux 底下關閉IPv6支援，請
Referece Link:
IPv6 for Microsoft:FAQ