Re: [homenet] I-D Action: draft-haddad-homenet-multihomed-00

Michael Thomas <mike@mtcc.com> Thu, 25 October 2012 13:38 UTC

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Date: Thu, 25 Oct 2012 06:38:29 -0700
From: Michael Thomas <mike@mtcc.com>
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To: Arifumi Matsumoto <arifumi@nttv6.net>
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Cc: homenet@ietf.org, james woodyatt <jhw@apple.com>, Lorenzo Colitti <lorenzo@google.com>
Subject: Re: [homenet] I-D Action: draft-haddad-homenet-multihomed-00
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On 10/24/2012 11:25 PM, Arifumi Matsumoto wrote:
> Hi,
>
>> Now - if we want to make this in a routed network where the VPN tunnel is
>> not terminated on the device itself, then RFC 3484/RFC6724 are not
>> sufficient.

That was, in fact, what I was thinking about.
> Even in such a case, you can configure manually the policy table on each host
> to meet the needs of such source address selection. This mechanism is
> included in
> both RFC 3484 and RFC 6724.
>
> Moreover, the policy table auto-configuration protocol is now at WGLC state
> in 6man.
>

My only point is that until such an auto-configuration protocol is widely
deployed, there is a real risk that NPT will be deployed as the stopgap that
never goes away. History is on the side of network-based fixes when hosts
can't do the right thing. This working group can snarl all it likes about such
heresies, but it won't alter the outcome if there's a perceived need.

Mike