Re: Confirmation to advance: draft-ietf-6man-ipv6only-flag-05

[Mark Andrews <[e-mail]>]

> On 28 May 2019, at 9:04 am, Sander Steffann <[e-mail]> wrote:
> 
> Hi David,
> 
> This is starting to feel like a personal attack...
> 
>> Then stop telling people to filter Ethertype 0x0800 because you can't use RFC2563 in the presence of such filters.
> 
> Those are different options, depending on your situation.
> 
>> Further, there really aren't IPv4 clients and separate IPv6 clients anymore, just about everything that matters is dual-stack.
> 
> Of course.
> 
>> So you are really saying, tell dual-stack clients to not use IPv4 using IPv4. So who is the purist? You're saying you can't block IPv4 because you have to use IPv4 to tell dual-stack clients they shouldn't use IPv4, now that's a catch 22.
> 
> Block the ethertype if you don't want any traffic, use the DHCP option if you want to explicitly inform clients, I don't care. There are plenty of options.
> 
>> Again this is a real problem is some at least a few situations, and they are fairly common situations, just not in the home broadband world at least today.
> 
> And there are solutions already available. Just pick one instead of inventing a new one…

Actually their isn’t a alternative solution.  There are several things trying to be achieved.

1) remove ALL IPv4 traffic from the network.
2) stopping hosts attempting to send IPv4 traffic onto the network.
3) being able to turn off IPv4 on the router interface.
4) needs to work on a BYOD network.
5) eventually being able to turn off ALL IPv4 packet processing in the router.

If you have a solution that achieves all these goals without signalling via IPv6 I’d like to see it.  Filtering can’t achieve 2.  RFC2563 can’t achieve 1 and 5.

Mark

> Cheers,
> Sander
> 
> 
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Mark Andrews, ISC
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