Re: [v6ops] 6to4v2 (as in ripv2)?

Tim Chown <tjc@ecs.soton.ac.uk> Wed, 27 July 2011 17:25 UTC

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Subject: Re: [v6ops] 6to4v2 (as in ripv2)?
From: Tim Chown <tjc@ecs.soton.ac.uk>
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Date: Wed, 27 Jul 2011 18:25:06 +0100
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References: <13205C286662DE4387D9AF3AC30EF456D3F431D11F@EMBX01-WF.jnpr.net> <4E2DE4EC.1030109@gmail.com> <4E2E2FBA.1030304@gmail.com> <13205C286662DE4387D9AF3AC30EF456D3F44833C5@EMBX01-WF.jnpr.net> <4E2EDF23.3060804@gmail.com> <4E2F4491.30102@gmail.com> <20110727023833.5C72D1232958@drugs.dv.isc.org> <968F0B1C-D082-4A59-8213-FD58C74AF89D@nominum.com> <20110727151517.CF9371235D70@drugs.dv.isc.org> <D0D20EB6-78C9-415D-9493-3AA08FAACEEF@ecs.soton.ac.uk> <EMEW3|fcf145b5033ff99790b7c34003f47686n6QGZC03tjc|ecs.soton.ac.uk|D0D20EB6-78C9-415D-9493-3AA08FAACEEF@ecs.soton.ac.uk> <20110727160331.A07C31236670@drugs.dv.isc.org> <E8FD4F5B-A87D-4D1D-9A10-9911AAE7A38D@ecs.soton.ac.uk>
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On 27 Jul 2011, at 17:03, Mark Andrews wrote:

> 0D20EB6-78C9-415D-9493-3AA08FAACEEF@ecs.soton.ac.uk>, Tim Chown writes:
>> 
>> a) use 6to4 anyway on an open platform like OpenWRT
> 
> Which may or may not still have the code.  OpenWRT could remove
> support just the same as another source could.  OpenWRT is also not
> widely supported by CPE vendors.  i.e. you are own your own if
> something goes wrong in most (not all) cases.

In the event OpenWRT should remove 6to4 support, just get like-minded people together (if there are lots of people that consciously want to use 6to4 for application development and testing) and roll your own.

>> b) use a tunnel broker - this works much better through NATs and with dynamic
>> IPv4 addresses
> 
> For which there is only experimental / ad-hoc code.  Please name
> CPE vendors that support tsp?  Please name CPE vendors that support
> tunnel re-configuration on re-number.

Jeroen has answered this, but I would point out, as an example of what can be done in short time, that I had a student last year who developed a mini-ITX Linux build with tunnel broker support, and IPv6 firewall and QoS support, using a web interface driving existing tools like iptables and tc.  He chose to use the HE broker, and it's a one-time registration after which it just works without further user intervention with HE.

It would be very interesting to see brokenness figures for well-known broker prefixes as against 6to4, if anyone is gathering such data.

>> c) use your $work VPN if it supports IPv6, which it could/should if your comp
>> any values IPv6
>> d) get IPv6 from your ISP, or move to one that has it if yours does not
> 
> Which is not always a viable option.

It is in the UK, at least.

Tim