Re: [Gen-art] Gen-Art review of draft-ietf-netext-access-network-option-10.txt

[jouni korhonen <[e-mail]>]

Alexey,

Thanks for the review. See some initial comments inline.


On May 5, 2012, at 8:58 PM, Alexey Melnikov wrote:

> I am the assigned Gen-ART reviewer for this draft. For background on
> Gen-ART, please see the FAQ at
> <http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>.
> 
> Please resolve these comments along with any other Last Call comments
> you may receive.
> 
> Document: draft-ietf-netext-access-network-option-10.txt
> Reviewer: Alexey Melnikov
> Review Date: 5 May 2012
> IETF LC End Date: 9 May 2012
> IESG Telechat date: Unknown
> 
> Summary: This draft is ready as a Proposed Standard
> 
> Major issues: none
> 
> Minor issues:
> 
> Minor: [ANI] and [TS23003] seem to be Normative (as per their use in 3.1.1)

If it is OK from the RFC process point of view, we can put these
non-IETF references into the normative section.

> 
> Nits/editorials:
> 
> 1.  Introduction
> 
>    This document defines a new mobility option, the Access Network
>    Identifier (ANI) option and its sub-options for Proxy Mobile IPv6,
>    that can be used by the mobile access gateway to signal the access
>    network information to the local mobility anchor.  The specific
>    details on how the local mobility anchor uses this information are
>    out-of-scope for this document.  These mobility options are optional
>    and are not mandatory for the Proxy Mobile IPv6 protocol.
> 
> Nit: Last sentence: "optional" and "not mandatory" are the same thing on my book.

Proposal for new text:

   "These mobility options are optional for the Proxy Mobile IPv6 protocol."

> 
> Strictly speaking PEN numbers are not limited to 4 bytes. However you have a registry for types of identifiers, so a new value can be allocated for bigger-than-4-bytes PENs.

Right. So we could just remove the 4 octet length requirement and use a 
"natural" length indicated octet coding for the PENs. For example

ANI Length = 1 -> PENs 0-255
ANI Length = 2 -> PENs 0-65535
ANI Length = 3 -> PENs 0-16777216
...

That would be ok?


- Jouni