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LC cmts: Extended Attrs



I have some comments on:  draft-ietf-radext-extended-attributes-00.txt

* In section 5, the Ext-Length field is defined as the length of the Extended
Attribute.  I think you mean it's the length of the TLV (multiple TLVs can be
in the Extended Attribute).  I think that would make the value ">=3", not ">=4".

* It's probably worth calling out any artifacts of overloading attribute 26
which wouldn't apply to standard attributes in the original number space
(or apply to overloading a new attribute instead of 26).  For example,
attribute 26 is already specifically excluded from some RADIUS message
types, e.g. CoA-NAK, so new Extended Attributes couldn't be included in
those messages, but new standard attribute could be.  Also, are malformed
VSAs always treated just like malformed non-VSAs?

* I think it would be useful to explicitly mention if recursive grouping is
allowed and that Extended Attributes cannot be grouped with non-Extended
Attributes.

* It's probably useful to mention what happens when an Extended Attribute's
tag is non-zero and it contains multiple TLVs (this does not seem to be
excluded -as multiple TLVs are when the M-bit is on).

* RFC2865 specifically calls out the proxies can't reorder attributes
of the same
type; does this doc need to create the same restriction for Ext-Type?

* I actually didn't have a lot of editorial comments :-)  Possibly the M-bit
could be renamed to avoid potential confusion with Diameter.

Greg


On Feb 10, 2008 3:50 PM, Bernard Aboba <bernard_aboba@hotmail.com> wrote:
>
>  This is a reminder of the ongoing RADEXT WG last call on the Extended
> RADIUS Attributes document, prior to sending it to the IESG for
> consideration as a Proposed Standard.   The document is available for
> inspection here:
> http://www.ietf.org/internet-drafts/draft-ietf-radext-extended-attributes-00.txt
>
> RADEXT WG last call will last until February 14, 2008.  Please send comments
> to the RADEXT WG mailing list (radiusext@ops.ietf.org) in the format
> described on the RADEXT WG Issues page:
> http://www.drizzle.com/~aboba/RADEXT/

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