Difference between revisions of "IPv6 (简体中文)"

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在Arch Linux, IPv6默认是打开的。如果你要找IPv6隧道的资料,可以看 [[IPv6 - Tunnel Broker Setup]].
 
在Arch Linux, IPv6默认是打开的。如果你要找IPv6隧道的资料,可以看 [[IPv6 - Tunnel Broker Setup]].
  

Revision as of 09:36, 7 September 2012

Summary help replacing me
This article covers IPv6, and basics of configuring different IPv6 related things like static IP adresses.
Related
IPv6 - Tunnel Broker Setup

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翻译状态: 本文是英文页面 IPv6翻译,最后翻译时间:2012-09-07,点击这里可以查看翻译后英文页面的改动。

在Arch Linux, IPv6默认是打开的。如果你要找IPv6隧道的资料,可以看 IPv6 - Tunnel Broker Setup.

Privacy Extensions

To enable Privacy Extensions for Stateless Address Autoconfiguration in IPv6 according to RFC 4941, reproduce the following steps:

Add these lines to /etc/sysctl.conf:

# Enable IPv6 Privacy Extensions
net.ipv6.conf.all.use_tempaddr = 2
net.ipv6.conf.default.use_tempaddr = 2
net.ipv6.conf.<nic0>.use_tempaddr = 2
...
net.ipv6.conf.<nicN>.use_tempaddr = 2

Where <nic0> to <nicN> are your nic's (the "all" or "default" parameters do not apply to nic's that already exist when the sysctl settings are applied).

After a reboot, at the latest, Privacy Extensions should be enabled.

Neighbor Discovery

Pinging the multicast address ff02::1 results in all hosts in link-local scope responding. An interface has to be specified. With a ping to the multicast address ff02::2 only routers will respond.

$ ping6 ff02::1%eth0

If you add an option -I <your-global-ipv6>, link-local hosts will respond with their link-global scope addresses. The interface can be omitted in this case.

$ ping6 -I 2001:4f8:fff6::21 ff02::1

静态地址

To assign a static address (for example 2001:470:1000:1000::5/64):

Add your static IP using netcfg. You can load them at startup by specifying your netcfg profiles in the NETWORKS section of /etc/rc.conf:

/etc/network.d/eth0

CONNECTION='ethernet'
DESCRIPTION='ipv6+ipv4 eth0'
INTERFACE='eth0'

IP=static
ADDR=192.168.1.5
NETMASK=24
ROUTES=
GATEWAY=192.168.1.1

IP6=static
ADDR6=(2001:470:1000:1000::5/64)
GATEWAY6=2001:470:1000:1000::1

/etc/rc.conf

NETWORKS=(eth0)

Finally DAEMONS section should contain "net-profiles" instead of the deprecated "network". See Netcfg for more information.

禁用 IPv6

禁用 IPv6 据称可以加速网络访问速度,因为在不支持 IPv6 的网络上程序也会试图使用它来访问。另外说一句, Firefox 也在受影响的程序列表中。在 IPv6 广泛采用之前,我们可以通过禁用它受益。

许多人并不需要这个特性,屏蔽它可以增加性能(许多程序会首先查询IPv6地址,不管你是否有IPv6连接)。

禁用 IPv6

Disabling IPv6 has been reported to speed up network access for programs that try using it before IPv4 on networks that do not support it. Incidentally, Firefox is listed among the affected applications. Until the widespread adoption of IPv6, one may benefit by disabling it.

Furthermore, an enabled ipv6 stack is known to expose bugs in some software in certain situations, even if it is not actually used. Disabling the stack works around these problems.

Note: As of version 3.2.6-2, the Arch kernel has IPv6 support built in directly [1]; therefore, the old ipv6 kernel module no longer exists. Blacklisting the module does not work anymore, but below method of disabling the IPv6-stack works.

Disable functionality

Adding ipv6.disable=1 to the kernel line in your bootloader configuration disables the whole ipv6 stack, which is likely what you want if you are experiencing issues.

Alternatively, adding ipv6.disable_ipv6=1 instead will keep the ipv6 stack functional, but not assign ipv6 addresses to any of your network devices.

One can also avoid assigning ipv6 addresses to specific nic's by adding the following sysctl config to /etc/sysctl.d/ipv6.conf:

# Disable IPv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.<nic0>.disable_ipv6 = 1
...
net.ipv6.conf.<nicN>.disable_ipv6 = 1

Note that you must list all the relevant nic's explicitly, as disabling "all" does not apply to nic's that are already set up when sysctl settings are applied.

Other programs

Disabling ipv6 functionality in the kernel does not prevent other programs from trying to use ipv6. In most cases, this is completely harmless, but if you find yourself having issues with that program, you should consult the program's manpages for a way to disable that functionality.

For instance, dhcpcd will continue to harmlessly attempt to perform ipv6 router solicitation. To disable this, as stated in the dhcpcd.conf manpage, add the following to /etc/dhcpcd.conf:

noipv6rs

附加资源

  • ipv6 - kernel.org 文档库