Re: [Anima-bootstrap] BRSKI State Machine

Brian E Carpenter <brian.e.carpenter@gmail.com> Mon, 17 October 2016 19:40 UTC

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To: "Michael Behringer (mbehring)" <mbehring@cisco.com>, "anima-bootstrap@ietf.org" <anima-bootstrap@ietf.org>
References: <c41c231f3906477f97f1641617de025e@XCH-RCD-006.cisco.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Tue, 18 Oct 2016 08:40:53 +1300
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Subject: Re: [Anima-bootstrap] BRSKI State Machine
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Hi Michael,
On 15/10/2016 03:42, Michael Behringer (mbehring) wrote:
...
> * First of all, one thing isn't coming out clearly (it's there, but somehow not obvious at all): We have three "paths" through the algorithm, and it is the *pledge* that has "hard coded" which paths we're taking: 
> 
> 1) join any domain (first come first join)  
>    --> No MASA required
> 2) require audit token 
>    --> MASA required, audit mode
> 3) require authentication token 
>    --> MASA required, ownership tracking mode
> 
> [I really hope we agree on that!!!]

What about the air gap case (no external interaction allowed, by site policy)?
Would there be a simulated MASA in that case? In any case, that is not a choice
that the pledge can make.

...
> - we need to specify precisely the discovery method, with mDNS field names, and other details. In my head we're using mDNS here, and I *think* we agreed on that? 

No, I think we agreed on supporting both mDNS or GRASP discovery; it is of course the
latter hat I've modelled. We have no need of mDNS for GRASP-capable nodes, but we must
support mDNS between the proxy and a non-GRASP-capable pledge. I've got no objection
to also specifying mDNS between the proxy and the registrar, but I think it's
redundant.

Indeed the details have to be specified; I haven't formally written them up for
the GRASP methods but they are embedded in my Python code.
(Again, https://www.cs.auckland.ac.nz/~brian/graspy/brski/)

Rgds
    Brian