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Re: [v6ops] draft-ietf-v6ops-6to4-to-historic WGLC

Mark ZZZ Smith <markzzzsmith@yahoo.com.au> Sun, 01 February 2015 05:06 UTC

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Date: Sun, 01 Feb 2015 05:03:21 +0000
From: Mark ZZZ Smith <markzzzsmith@yahoo.com.au>
To: Mikael Abrahamsson <swmike@swm.pp.se>, IPv6 Ops WG <v6ops@ietf.org>
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Subject: Re: [v6ops] draft-ietf-v6ops-6to4-to-historic WGLC
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----- Original Message -----
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: IPv6 Ops WG <v6ops@ietf.org>
Cc: 
Sent: Wednesday, 28 January 2015, 21:30
Subject: Re: [v6ops] draft-ietf-v6ops-6to4-to-historic WGLC

On Wed, 28 Jan 2015, Lorenzo Colitti wrote:

> some CPE manufacturers included it and turned it on by default, and c) some
> OSes prefer it to IPv4. That was all long ago, but old hardware dies hard.

I have a datapoint here. For instance at least one software version (the 
one that was on the one I used at the time) on the Linksys EA4500, if IPv6 
is set to the default "automatic", it'll do nothing unless it gets a 
DHCPv6-PD or other signalling. If you however turn it to "off" (I believe, 
this was two years ago), it'll start to do 6to4 and send out RAs on the 
wifi/LAN ports with the derived IPv4-GUA 6to4 IPv6 prefix.

So there might very well be plenty of people out there who changed 
something on their home gateway, didn't know what they did, but now 
they're running 6to4 and they have no idea about it and it's not something 
they want to do.


* It's quite a while since I had access to one, however the FrizBox CPE were perceived to be a good IPv6 CPE in around 2010, yet they tried to do some 'interesting' things with IPv6/IPv6 access (ULAs with all zeros random part, dynamically *switch* between ULA and GUA prefixes based on the state of the ADSL interface). I have a very faint glimpse of memory that they also might have tried to do something like enabling 6to4 if native IPv6 wasn't available (perhaps if IPv6 was globally enabled).

Here is my email about this I found from two years ago:

http://lists.cluenet.de/pipermail/ipv6-ops/2013-February/008520.html

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se


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