netdev - Re: 答复: ANNOUNCE: Enhanced IP v1.4

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Date:   Mon, 4 Jun 2018 06:02:30 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     PKU.孙斌 <bswen@....edu.cn>,
        'Willy Tarreau' <w@....eu>,
        'Eric Dumazet' <eric.dumazet@...il.com>
Cc:     'Linux Kernel Network Developers' <netdev@...r.kernel.org>
Subject: Re: 答复: ANNOUNCE: Enhanced IP v1.4



On 06/03/2018 10:58 PM, PKU.孙斌 wrote:
> On Sun, Jun 03, 2018 at 03:41:08PM -0700, Eric Dumazet wrote:
>>
>>
>> On 06/03/2018 01:37 PM, Tom Herbert wrote:
>>
>>> This is not an inconsequential mechanism that is being proposed. It's
>>> a modification to IP protocol that is intended to work on the
>>> Internet, but it looks like the draft hasn't been updated for two
>>> years and it is not adopted by any IETF working group. I don't see how
>>> this can go anywhere without IETF support. Also, I suggest that you
>>> look at the IPv10 proposal since that was very similar in intent. One
>>> of the reasons that IPv10 shot down was because protocol transition
>>> mechanisms were more interesting ten years ago than today. IPv6 has
>>> good traction now. In fact, it's probably the case that it's now
>>> easier to bring up IPv6 than to try to make IPv4 options work over the
>>> Internet.
>>
>> +1
>>
>> Many hosts do not use IPv4 anymore.
>>
>> We even have the project making IPv4 support in linux optional.
> 
> I guess then Linux kernel wouldn't be able to boot itself without IPv4 built in, e.g., when we only have old L2 links (without the IPv6 frame type)...



*Optional* means that a CONFIG_IPV4 would be there, and some people could build a kernel with CONFIG_IPV4=n,

Like IPv6 is optional today.

Of course, most distros will select CONFIG_IPV4=y  (as they probably select CONFIG_IPV6=y today)

Do not worry, IPv4 is not dead, but I doubt Enhanced IP v1.4 has any chance,
it is at least 10 years too late.