Android’s IPv6 Is Still Broken

栏目: IT技术 · 发布时间: 4年前

内容简介:I got into some interesting discussions about IPv6 on Twitter. Then someone asked if Android is getting DHCPv6 support in version 11 of the OS.When IPv6 was developed, initially withThis sounds good in theory but ignores completely the lessons we’ve learne

I got into some interesting discussions about IPv6 on Twitter. Then someone asked if Android is getting DHCPv6 support in version 11 of the OS.

@Enno_Insinuator @ehorley Do you know if @android will support DHCPv6 in android 11 ?

— IP networks (@rtaccon) May 21, 2020

When IPv6 was developed, initially with RFC 2460 , there was this idea that:

Forget all you've learned about IPv4, and design IPv6 from the ground up

This sounds good in theory but ignores completely the lessons we’ve learned from IPv4. Not to mention, there is no such thing as greenfield . Almost all networks, are existing ones, you don’t get to start all over again . There was this very shiny view of end to end connectivity, /64 everywhere and only SLAAC allowed. I get all of that, it’s like saying “I wish there were no wars”, but unfortunately, people are stupid, so there will be wars. There’s this naivety, similar to a teenager that is growing up. You want to change the world, then you realize the world is run by money, mega corps, and dirty politicians.

This whole mess led to the holy wars of SLAAC + RDNSS vs DHCPv6. Please note that SLAAC didn’t even initially have the option of setting a DNS server. Basically, that meant you only had a partial implementation. It’s pretty useful to have a DNS server… Initially, Microsoft operating systems did support SLAAC but not RDNSS, Android did not want to support DHCPv6 . That meant that you couldn’t support these two operating systems on the same subnet.

Much to my surprise, Android still has a broken IPv6 implementation in 2020. By design. They are not going to fix it. There are a couple of valid arguments from Google and Lorenzo Colitti, but they are pretty weak. The irony of it all though is that people are asking for it but Google is not willing to implement it, because they think they know better than their users . They will happily spy on you, serve you ads, and sell your data , but allowing you to run DHCPv6 would be doing you a disservice.

There’s no doubt that SLAAC works , and that it can work in fairly large environments, still, DHCPv6 is in my mind the better option. The fallacy here is that many IPv6 evangelists take this ivory tower view of ignoring business requirements. There are business requirements, and compliance requirements, where you need to track what host had what IP at what time. Also, enterprises do stupid things. That’s just a fact. Google is not the one that should decide what you get to do .

You could, of course, run both SLAAC and DHCPv6 simultaneously, but why? If you read the Google thread above, you will see that many people have wasted a lot of time, and have very valid business reasons, for why they want DHCPv6 implemented. Here are a few:

  • Ability to assign suffix such as megacorp.com
  • Register hosts in DNS
  • Keep track of what host had what IP at a certain time
  • Image deployment via PXE (think DHCP options)
  • Other DHCP options used for example for WLC
  • Ability to easily swap DNS server in entire network (think Umbrella deployment)
  • Dot1X deployment where you want RADIUS server to see DHCP request
  • Need to support IP phones

I’m sure there are some workarounds for some of the use cases but my point is: Enterprises need DHCPv6, Google, or anyone else for that matter, should not dictate what options you have at your hand. So, sadly, even in 2020, Android still has a broken IPv6 implementation.

It’s 2020 And Android’s IPv6 Is Still Broken


以上所述就是小编给大家介绍的《Android’s IPv6 Is Still Broken》,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对 码农网 的支持!

查看所有标签

猜你喜欢:

本站部分资源来源于网络,本站转载出于传递更多信息之目的,版权归原作者或者来源机构所有,如转载稿涉及版权问题,请联系我们

追踪Linux TCP/IP代码运行

追踪Linux TCP/IP代码运行

秦健 / 北京航空航天大学出版社 / 2010-4-1 / 69.00元

本书以应用程序为线索,详细描述了数据包在协议栈的分段、重组、发送、接收过程,同时分析了路由的初始化和设置过程,主要包括socket应用程序、 TCP/IP协议、路由、通知链、邻居子系统等内容。全书涵盖了协议栈的全部知识点,对于广大的读者来说这是一本极其难得的技术资料。同时,书中论述了网络设备的工作原理,解释了RTL8169和嵌入式CS8900、DM9000网卡设备的核心过程。一起来看看 《追踪Linux TCP/IP代码运行》 这本书的介绍吧!

XML 在线格式化
XML 在线格式化

在线 XML 格式化压缩工具

RGB HSV 转换
RGB HSV 转换

RGB HSV 互转工具

HSV CMYK 转换工具
HSV CMYK 转换工具

HSV CMYK互换工具