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Re: [homenet] Let's make in-home ULA presence a MUST !?

Michael Richardson <mcr@sandelman.ca> Wed, 15 October 2014 00:00 UTC

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From: Michael Richardson <mcr@sandelman.ca>
To: James Woodyatt <jhw@nestlabs.com>
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Date: Tue, 14 Oct 2014 20:00:09 -0400
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Cc: HOMENET Working Group <homenet@ietf.org>
Subject: Re: [homenet] Let's make in-home ULA presence a MUST !?
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James Woodyatt <jhw@nestlabs.com> wrote:
    > A) An autonomously generated ULA prefix SHOULD be advertised when no
    > other delegated prefix is valid.

I think most people agree about this.

    > B) Whenever there is any valid delegated prefix, advertisements for an
    > existing autonomously generated ULA prefix MUST be deprecated,
    > i.e. updated with preferred lifetime of zero.

I'm not sure why this is a good thing.

    > D) Whenever there is no longer any valid delegated prefix,
    > advertisements for a previously deprecated autonomously generated ULA
    > prefix MUST be updated with non-zero preferred lifetime.

Does it have to be the same ULA?

Consider the case where there are multiple gateways, which can not see
whether the other gateways have GUA or not.
Given that, how can anyone know when to withdraw the ULA?

--
]               Never tell me the odds!                 | ipv6 mesh networks [
]   Michael Richardson, Sandelman Software Works        | network architect  [
]     mcr@sandelman.ca  http://www.sandelman.ca/        |   ruby on rails    [

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