Re: IPv4 traffic on "ietf-v6ONLY"

Alexandre Petrescu <alexandre.petrescu@gmail.com> Fri, 17 November 2017 04:50 UTC

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Subject: Re: IPv4 traffic on "ietf-v6ONLY"
To: ipv6@ietf.org
References: <f9805855-68cf-a3e8-a13f-c6ac31b09058@gmail.com> <bbd4e1d2-047f-6758-76f8-fd591c51dad7@gmail.com> <D631CE54.8C0F5%lee@asgard.org> <m1eEvEP-0000G3C@stereo.hq.phicoh.net> <D75288D5-B571-46EB-A35E-0DBD79F930E5@google.com>
From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Date: Fri, 17 Nov 2017 05:50:04 +0100
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Le 15/11/2017 à 20:15, james woodyatt a écrit :
> On Nov 15, 2017, at 02:47, Philip Homburg 
> <pch-ipv6-ietf-4@u-1.phicoh.com <mailto:pch-ipv6-ietf-4@u-1.phicoh.com>> 
> wrote:
>>
>> The safest option to do that is a DHCPv4 option that says 'no IPv4 
>> service here, go away'.
> 
> Better: extend ARP with a signal that says, “ARP is not welcome here."

During changes between the 3 SSIDs I noticed often the message "Windows 
detected an IP address conflict" popped up.  The explanation says that 
another computer on the network has the same address, contact the 
sysadmin, and more details are available.

This makes wonder whether someone put a computer there that responds to 
all ARP resolution requests for LLs 169, claiming them all.

It happens systematically when changing the ESSID from "ietf" to 
"ietf-v6ONLY".  If, prior to that change, I disable the IPv4 checkbox in 
interface Properties, the message does not pop up.

However, this message appears also when changing attachment from SSID 
"ietf-v6ONLY" to "ietf".

Alex

> 
> --james woodyatt <jhw@google.com <mailto:jhw@google.com>>
> 
> 
> 
> 
> 
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