Re: [secdir] SecDir review of draft-ietf-pim-hello-intid-01

Hi,

Resending because I keep forgetting to remove the "-xx" from the document 
title to make the mailer happy.

Thanks,
Chris

On Mon, 8 Aug 2011, Chris Lonvick wrote:

> Hi,
>
> I have reviewed this document as part of the security directorate's
> ongoing effort to review all IETF documents being processed by the
> IESG.  These comments were written primarily for the benefit of the
> security area directors.  Document editors and WG chairs should treat
> these comments just like any other last call comments.
>
> Overall I find the document to be of good quality and I agree that the 
> security considerations section is adequate.
>
> While PIM is certainly not my strong suit the document is understandable 
> except for the following paragraph from Section 2.1:
>
>    The Local Interface Identifier MUST be non-zero.  The reason for
>    this, is that some protocols may want to only optionally refer to an
>    Interface using the Interface Identifier Hello option, and use the
>    value of 0 to show that it is not referred to.  Note that the value
>    of 0 is not a valid ifIndex as defined in [RFC1213].
>
> This seems to be saying that the Local Interface Identifier must not be 0, 
> except when some protocol wants to use the Interface Identifier Hello to not 
> refer to any actual interface.  Which leaves me confused.
>
> Regards,
> Chris
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