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Re: [Pppext] [rbridge] TRILL, IS-IS, and System ID

"Les Ginsberg (ginsberg)" <ginsberg@cisco.com> Wed, 01 June 2011 16:33 UTC

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Date: Wed, 01 Jun 2011 09:32:33 -0700
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Thread-Topic: [rbridge] [Pppext] TRILL, IS-IS, and System ID
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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: James Carlson <carlsonj@workingcode.com>, "Stewart Bryant (stbryant)" <stbryant@cisco.com>
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Cc: PPP Extensions <pppext@ietf.org>, rbridge@postel.org, isis mailing list <isis-wg@ietf.org>, William Allen Simpson <william.allen.simpson@gmail.com>
Subject: Re: [Pppext] [rbridge] TRILL, IS-IS, and System ID
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(Please include isis-wg on this thread.)

James -

> -----Original Message-----
> From: rbridge-bounces@postel.org [mailto:rbridge-bounces@postel.org]
On
> Behalf Of James Carlson
> Sent: Wednesday, June 01, 2011 8:51 AM
> To: Stewart Bryant (stbryant)
> Cc: PPP Extensions; Donald Eastlake; rbridge@postel.org; William Allen
> Simpson
> Subject: Re: [rbridge] [Pppext] TRILL, IS-IS, and System ID
> 
> Stewart Bryant wrote:
> >
> >> All that said, I don't really care.  This is a tempest in a teapot.
> I
> >> can mash together both texts if the Routing ADs are willing to
> accept a
> >> passing reference here to a draft that, in their words, hasn't even
> been
> >> considered by the IS-IS community.
> > James,
> >
> > I believe that any departure from the text in ISO10589 needs
> > to be discussed in the ISIS WG.
> 
> "Any" departure?  No matter how subservient?  That seems as inflexible
> as the other end of this spectrum.
> 
> If I suggested text like this, would it require ISIS WG discussion,
> and,
> if so, what's the chance that this discussion would terminate in a
> positive way?
> 
>    3. An implementation that has only PPP links might have no
>       Organizationally Unique Identifier (OUI) that can form an IS-IS
>       System ID.  Resolving that issue is outside the scope of this
>       document, however it is strongly RECOMMENDED that all TRILL
>       implementations have at least one zero-configuration mechanism
to
>       obtain a valid System ID.  Refer to ISO/IEC 10589 regarding
> System
>       ID uniqueness requirements.  Alternative solutions to this issue
>       may also be defined in the future; see [8] for an example.

I have a BIG PROBLEM with references to 

  [8] W. Simpson, "Generation of Unique IS-IS System Identifiers,"
       (draft-simpson-isis-ppp-unique), work in progress, March 2011

This has been publicly reviewed and noted (and I think quite correctly
so) as being seriously flawed. So even a passing suggestion that this
might be a reasonable alternative for someone seems at best very
premature.

   Les

> 
> --
> James Carlson         42.703N 71.076W
> <carlsonj@workingcode.com>
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